 
    AutoCAD Command List  (' = transparent command)

APERTURE       CHANGE         DIVIDE         EXTEND         ISOPLANE
ARC            CHPROP         DONUT          FILES          LAYER
AREA           CIRCLE         DOUGHNUT       FILL           LIMITS
ARRAY          COLOR          DRAGMODE       FILLET         LINE
ATTDEF         COPY           DTEXT          FILMROLL       LINETYPE
ATTDISP        DBLIST         DVIEW          'GRAPHSCR      LIST
ATTEDIT        DDATTE         DXBIN          GRID           LOAD
ATTEXT         DDEDIT         DXFIN          HANDLES        LTSCALE
AUDIT          'DDEMODES      DXFOUT         HATCH          MEASURE
AXIS           'DDLMODES      EDGESURF       'HELP / '?     MENU
BASE           'DDRMODES      ELEV           HIDE           MINSERT
BLIPMODE       DDUCS          ELLIPSE        ID             MIRROR
BLOCK          DELAY          END            IGESIN         MOVE
BREAK          DIM/DIM1       ERASE          IGESOUT        MSLIDE
CHAMFER        DIST           EXPLODE        INSERT         MSPACE

\
    AutoCAD Command List  (' = transparent command)

MULTIPLE       PSPACE         RSCRIPT        STYLE          VIEWPORTS
MVIEW          PURGE          RULESURF       TABLET         VIEWRES
OFFSET         QTEXT          SAVE           TABSURF        VPLAYER
OOPS           QUIT           SCALE          TEXT           VPOINT
ORTHO          REDEFINE       SCRIPT         'TEXTSCR       VPORTS
OSNAP          REDO           SELECT         TIME           VSLIDE
'PAN           'REDRAW        'SETVAR        TRACE          WBLOCK
PEDIT          'REDRAWALL     SHADE          TRIM           XBIND
PFACE          REGEN          SHAPE          U              XREF
PLAN           REGENALL       SHELL/SH       UCS            'ZOOM
PLINE          REGENAUTO      SKETCH         UCSICON        3DFACE
PLOT           RENAME         SNAP           UNDEFINE       3DMESH
POINT          'RESUME        SOLID          UNDO           3DPOLY
POLYGON        REVSURF        STATUS         UNITS
PRPLOT         ROTATE         STRETCH        'VIEW

At the "Command:" prompt, you can enter RETURN to repeat the last command.

\
             AutoCAD System Variable List  

ACADPREFIX     CELTYPE        DIMCLRD        DIMTAD         DWGPREFIX
ACADVER        CHAMFERA       DIMCLRE        DIMFAC         ELEVATION
AFLAGS         CHAMFERB       DIMCLRT        DIMTIH         EXPERT
ANGBASE        CLAYER         DIMDLE         DIMTIX         EXTMAX
ANGDIR         CMDECHO        DIMDLI         DIMTM          EXTMIN
APERTURE       COORDS         DIMEXE         DIMTP          FILEDIA
AREA           CVPORT         DIMEXO         DIMTOFL        FILLETRAD
ATTDIA         DATE           DIMGAP         DIMTOH         FILLMODE
ATTMODE        DIMALT         DIMLFAC        DIMTOL         FONTZ
ATTREQ         DIMALTD        DIMLIM         DIMTSZ         GRIDMODE
AUNITS         DIMALTF        DIMPOST        DIMTVP         GRIDUNIT
AUPREC         DIMAPOST       DIMRND         DIMTXT         HANDLES
AXISMODE       DIMASO         DIMSAH         DIMZIN         HIGHLIGHT
AXISUNIT       DIMASZ         DIMSCALE       DISTANCE       INSBASE
BACKZ          DIMBLK         DIMSE1         DRAGMODE       LASTANGLE
BLIPMODE       DIMBLK1        DIMSE2         DRAGP1         LASTPOINT
CDATE          DIMBLK2        DIMSHO         DRAGP2         LASTPT3D
CECOLOR        DIMCEN         DIMSOXD        DWGNAME        LENSLENGTH

\
             AutoCAD System Variable List  

LIMCHECK       POPUPS         SPLINETYPE     TRACEWID       USERR5
LIMMAX         QTEXTMODE      SURFTAB1       UCSFOLLOW      VIEWCTR
LIMMIN         RATVMAX        SURFTAB2       UCSICON        VIEWDIR
LTSCALE        REGENMODE      SURFTYPE       UCSNAME        VIEWMODE
LUNITS         SCREENSIZE     SURFU          UCSORG         VIEWSIZE
LUPREC         SHADEDGE       SURFV          UCSXDIR        VIEWTWIST
MAXCTVP        SHADEDIF       TARGET         UCSYDIR        VISRETAIN
MAXSORT        SKETCHINC      TDCREATE       UNITMODE       VPOINTX
MENUECHO       SKPOLY         TDINDWG        USERI1         VPOINTY
MENUNAME       SNAPANG        TDUPDATE       USERI2         VPOINTZ
MIRRTEXT       SNAPBASE       TDUSRTIMER     USERI3         VXMAX
ORTHOMODE      SNAPISOPAIR    TEMPPREFIX     USERI4         VXMIN   
OSMODE         SNAPMODE       TEXTEVAL       USERI5         WORLDUCS 
PDMODE         SNAPSTYL       TEXTSIZE       USERR1         WORLDVIEW
PDSIZE         SNAPUNIT       TEXTSTYLE      USERR2
PERIMETER      SPLFRAME       THICKNESS      USERR3
PICKBOX        SPLINESEGS     TILEMODE       USERR4

At the "Command:" prompt you can enter any of these system variables.

\
        AutoCAD AME Command List

SOLAREA        SOLFEAT        SOLMAT         SOLSECT        SOLVAR  
SOLBOX         SOLFILL        SOLMESH        SOLSEP         SOLWEDGE
SOLCHAM        SOLIDIFY       SOLMOVE        SOLSPHERE      SOLWIRE 
SOLCHP         SOLIN          SOLOUT         SOLSUB                  
SOLCONE        SOLINT         SOLPROF        SOLTORUS           
SOLCYL         SOLLIST        SOLPURGE       SOLUNION     
SOLEXT         SOLMASSP       SOLREV         SOLUCS

        AutoCAD AME System Variables

SOLAMEVER      SOLDELENT      SOLHSIZE       SOLPAGELEN     SOLSUBDIV
SOLAREAU       SOLDISPLAY     SOLLENGTH      SOLRENDER      SOLVOLUME
SOLAXCOL       SOLHANGLE      SOLMASS        SOLSERVMSG     SOLWDENS
SOLDECOMP      SOLHPAT        SOLMATCURR     SOLSOLIDIFY

\
You can enter points, or coordinates, in any of the following ways:

   Absolute:     x,y
   Relative:     @deltax,deltay
   Polar:        @dist<angle

For the commands that accept 3D points, you can include a Z coordinate
in the absolute and relative formats:

   Absolute:     x,y,z
   Relative:     @deltax,deltay,deltaz
   Spherical:    @dist<ang1<ang2
   Cylindrical:  @dist<ang,z

If you omit the Z coordinate, the current elevation is used.

Polar, spherical, and cylindrical coordinates can now be entered
with or without a leading "@".  The leading "@" is the relative
format while absence of the "@" indicates absolute format.

A leading "*" (or "*" following "@") denotes a World point.

\

X/Y/Z filters can be used to compose a full point from the X, Y, and
Z components of intermediate points.  For instance, the filter ".X"
will instruct AutoCAD to use just the X coordinate of the following
point.  The Y (and possibly Z) values will then be requested.

See also:   "Entity Selection" in chapter 2 of the AutoCAD Reference Manual.

\
Object selection:  ("Select objects:")

   (point)  =  One object
   Multiple =  Multiple objects selected by pointing
   Last     =  Last object
   Previous =  All objects in the Previous selection-set
   Window   =  Objects within Window
   Crossing =  Objects within or Crossing window
   BOX      =  Automatic Crossing (to the left) or Window (to the right)
   AUto     =  Automatic BOX (if pick in empty area) or single object pick
   SIngle   =  One selection (any type)
   Add      =  Add mode: adds following objects to selection-set
   Remove   =  Remove mode: removes following objects from selection-set
   Undo     =  Undoes/removes last

When you are satisfied with the selection-set as it stands, enter RETURN
(except for Single mode, which does not require an extra RETURN).

See also:   "Entity Selection" in chapter 2 of the AutoCAD Reference Manual.

\ACADPREFIX
ACADPREFIX
The directory path, if any, specified by the ACAD environment variable                     
(read-only).
\ACADVER
ACADVER
This is the AutoCAD version number (read-only).
\AFLAGS
AFLAGS
Attribute flags bit-code for Attdef command (sum of the following):
   1 = Invisible
   2 = Constant
   4 = Verify
   8 = Preset
\ANGBASE
ANGBASE
Angle 0 direction (with respect to the current UCS).
\ANGDIR
ANGDIR
Angle direction (with respect to the current UCS).
   1 = clockwise angles
   0 = counterclockwise
\APERTURE
The  APERTURE  command governs the size of the "target" crosshairs
for object snap purposes.

Format:     APERTURE
            Object snap target height (1-50 pixels) <default>: (number)

The object snap target height can also be changed through the APERTURE 
system variable using the SETVAR command.

See also:   "Aperture Command" in chapter 8 of the AutoCAD Reference Manual.

\ARC
The  ARC  command draws an arc (circle segment) as specified by any of
the following methods.

  - Three points on the arc
  - Start point, center, endpoint
  - Start point, center, included angle
  - Start point, center, length of chord
  - Start point, endpoint, radius
  - Start point, endpoint, included angle
  - Start point, endpoint, starting direction
  - Continuation of previous line or arc

3-point format:  ARC  Center/<Start point>:  (point)
                 Center/End/<Second point>:  (point)
                 End point:  (point)

Options:  A = Included Angle    D = Starting Direction    L = Length of chord
          C = Center point      E = Endpoint              R = Radius
          To continue previous line or arc, reply to first prompt with RETURN.

See also:   "Arc Command" in chapter 4 of the AutoCAD Reference Manual.
\ARC,Center/<Start point>
Enter a point that is the starting point of the arc.  Or, enter "c" to
specify the center (radius point) of the arc first.
\ARC,Center/End/<Second point>
The start point of the arc has been selected.

Options:
- <Default>: Enter a second point on the arc.
- Enter "c" to specify the arc's center (radius point) next.
- Enter "e" to specify the arc's endpoint next.
\ARC,Direction
Enter the arc's direction from the start point (the arc will be tangent to
the direction line at the start point).

The direction can be entered as an angle or be specified by pointing to a
single point.  In this case AutoCAD determines the direction as the line
from the start point to the specified point.
\AREA
The  AREA  command calculates the area and perimeter enclosed by a sequence
of points you enter, or defined by a specified circle or polyline.  A running
total of measured areas can be kept, and you can ask AutoCAD to add or
subtract subsequent areas from the total.

Format:     AREA  <First point>/Entity/Add/Subtract:  (point)
            Next point:  (point)
            Next point:  (point)
            Next point:  ...press RETURN to endpoint entry
            Area = nnnn  Perimeter = nnnn

If add or subtract mode has been selected, AREA then adds to (or subtracts
from) the running total, displays the running total, and repeats the options
prompt.  The options are:

    Add       - Adds the area to the running total.
    Subtract  - Subtracts the area from the running total.
    Entity    - Computes the area of a selected Circle or Polyline.
    RETURN    - A null reply exits the AREA command.

See also:   "Area Command" in chapter 5 of the AutoCAD Reference Manual.
\
AREA is also a read-only system variable that displays the true area
computed by AREA, LIST or DBLIST.

\ARRAY
The  ARRAY  command makes multiple copies of selected objects, in a
rectangular or circular pattern.

Format:     ARRAY  Select objects: (Show what to copy)
            Rectangular or Polar array (R/P):

For a rectangular array, you are asked for the number of columns and
rows, and the spacing between them.  The array is built along a baseline
defined by the current Snap rotation angle set by the SNAP Rotate
command.

For a polar, or circular, array, you must first supply a center point.
Following this, you must supply two of the following three parameters:

  - The number of items in the array
  - The number of degrees to fill
  - The angle between items in the array

Optionally, you can rotate the items as the array is drawn.

See also:   "Array Command" in chapter 5 of the AutoCAD Reference Manual.
\ATTDEF
The  ATTDEF  command creates an Attribute Definition. First, you specify
the modes for this Attribute Definition.  The modes are:

   Invisible  - Does not display, but allows extraction.
   Constant   - All occurrences of this Attribute have the same value.
   Verify     - Issues extra prompts to verify a proper value.
   Preset     - Does not prompt for this Attribute during Block insertion.

Format: ATTDEF Attribute modes -- Invisible:N  Constant:N  Verify:N Preset:N
        Enter (ICVP) to change, RETURN when done:

The tag, prompt, and default value for the Attribute are then requested,
as are its location, height, and rotation angle.

            Attribute tag: (up to 31 chars; letters, digits, $, -, _)
            Attribute prompt:
            Default attribute value:
            Justify/Style/<Start Point>:
            Height <default>:
            Rotation angle <default>:

See also:   "Attdef Command" in chapter 9 of the AutoCAD Reference Manual.
\ATTDEF,Attribute tag
Enter up to 31 characters for the attribute tag.  The tag can contain any
characters except blanks, and must not be null.  It is used to identify each
occurrence of the attribute in your drawing.
\ATTDEF,Attribute prompt
Enter the prompt line that you want to appear later when a Block containing
this Attribute Definition is inserted.  If you specify a null prompt (by
responding with RETURN), the attribute tag is used as the prompt.
\ATTDEF,Default Attribute value
\ATTDEF,Attribute value
Enter the default Attribute value.  If you enter a null response, no default
value will be displayed later when a Block containing this Attribute
Definition is inserted.
\ATTDISP
The  ATTDISP  command can be used to override the visibility mode set for
Attributes on a global basis.

Format:     ATTDISP  Normal/ON/OFF <current>:

   Normal  - Visible Attributes are displayed, invisible Attributes are not.
   On      - All Attributes are made visible.
   Off     - All Attributes are made invisible.

See also:   "Attdisp Command - Visibility Control" in chapter 9 of the 
            AutoCAD Reference Manual.
\ATTDIA
ATTDIA
A value of 1 causes the INSERT command to use a dialogue box for entry
of Attribute values; 0 to issue prompts.
\ATTEDIT
The  ATTEDIT  command allows you to modify certain aspects of Attributes
independent of the Blocks in which they reside.  You can perform global or
individual editing, and you can restrict the operation to certain Blocks,
Attribute tags, and Attribute values, or to just those Attributes that are
currently visible on the screen.

Format:     ATTEDIT  Edit Attributes one by one? <Y>  (N = global)
            Block name specification <*>:
            Attribute tag specification <*>:
            Attribute value specification <*>:

Wild-card characters can be included in the responses.

See also:   "Attedit Command - Editing Attributes" in chapter 9 of the 
            AutoCAD Reference Manual.
\ATTEXT
The  ATTEXT  command is used to extract Attribute information from a drawing
for analysis by another program or for transfer to a database.  You can
extract the whole drawing or only a selected set of entities.

Format:     ATTEXT  CDF, SDF, or DXF Attribute extract (or Entities)? <C>:

If you respond with "cdf", "sdf", or "dxf", the entire drawing will
be extracted.  If you respond with "e," the "Select objects:" prompt
appears, and you can select a set of entities to extract.  ATTEXT then
again prompts:

            CDF, SDF, or DXF Attribute extract? <C>:

The extract formats are as follows:

   CDF - Comma Delimited Format
   SDF - Standard (Fixed field) Format
   DXF - Drawing Interchange Format

CDF format is the default Attribute extraction format.

See also:   "Attext Command -- Attribute Extraction" in chapter 9 of the 
            AutoCAD Reference Manual.
\ATTMODE
ATTMODE
Attribute display mode 
   0 = Off
   1 = Normal
   2 = On
\ATTREQ
ATTREQ
A value of 0 assumes defaults for the values of all Attributes during the
insert of Blocks; 1 enables prompts (or dialogue box) for Attribute values,
as selected by ATTDIA.
\AUDIT
The  AUDIT  command invokes a drawing database audit and optional recovery.
Auditing range-checks all header variables, verifies that names in symbol
tables are valid and unique, checks that all floating point values are well
defined, and verifies the validity of extended entity data. An audit log file
named <DWGNAME>.ADT is created (or the existing log is replaced), reporting
errors found and the corrective action taken, if any.

Format:     AUDIT  Fix any errors detected? <N>:

If you respond with "y", the drawing database is modified, fixing any
errors found. A null response (or "n") causes only the audit log to be
written.

See also:   "Audit Command -- Examining a Drawing" in chapter 3 of the 
            AutoCAD Reference Manual.
\AUNITS
AUNITS
Angular units mode
   0 = Decimal degrees
   1 = Degrees/minutes/seconds
   2 = Grads
   3 = Radians
   4 = Surveyor's units
\AUPREC
AUPREC
Angular units decimal places.
\AXIS
The  AXIS  command controls the display of axes, or ruler lines, along the
edge of the graphics display.

Format:     AXIS  Tick spacing(X) or ON/OFF/Snap/Aspect <current>:

    Spacing(X)  - A simple number sets axis tick spacing in drawing
                  units.  A number followed by "X" (e.g., "2X")
                  sets the tick spacing to a multiple of the current
                  snap resolution.  A value of zero locks the tick
                  spacing to the current snap resolution.
    ON          - Turns axis on with previous spacing.
    OFF         - Turns axis off.
    Snap        - Locks the tick spacing to the current snap
                  resolution (same as a spacing value of zero).
    Aspect      - Permits an axis with different horizontal and
                  vertical spacing.

See also:   "Axis Command -- Ruler Lines" in chapter 8 of the 
            AutoCAD Reference Manual.
\AXISMODE
AXISMODE
Axis display on if 1, off if 0.
\AXISUNIT
AXISUNIT
Axis spacing, X, and Y.
\BACKZ
BACKZ
Back clipping plane offset for the current viewport, in drawing units.
Meaningful only if the back clipping bit in VIEWMODE is on.  The distance
of the back clipping plane from the camera point can be found by subtracting
BACKZ from the camera-to-target distance (read-only).
\BASE
BASE
The  BASE  command defines a reference point for insertion
and rotation of the current drawing in subsequent drawings.

Format:     BASE  Base point <default>:  (point)

See also:   "Base Command" in chapter 9 of the AutoCAD Reference Manual.
\BLIPMODE
The  BLIPMODE  command controls the generation of marker "blips" - the
small temporary marks drawn whenever you designate a point.   When
BLIPMODE is on, blips are drawn; when off, blips are suppressed.

Format:     BLIPMODE  ON/OFF <current>:

See also:   "Blipmode Command" in chapter 6 of the AutoCAD Reference Manual.

BLIPMODE is also a system variable.  Using the SETVAR command, blip
markers are set on if 1 or off if 0.
\BLOCK
The  BLOCK  command allows you to name a group of objects that can
then be INSERTed as a unit anywhere in the current drawing, with
specified X and Y scales and rotation.

format:     BLOCK  Block name (or ?):  (name)
            Insertion base point:  (point)
            Select objects:  (select)

The objects you select will be erased as they are copied into the
Block.  If you want to restore them, use the OOPS command.

If you respond to the "Block name" prompt with a "?", AutoCAD will
list the names of all Blocks currently defined in this drawing.

See also:   "Block Command -- Block Definition" in chapter 9 of the 
            AutoCAD Reference Manual.
\BLOCK,Insertion base point
Designate the point to be used as the base (reference) point for subsequent
insertions of this Block.  This will also be the point about which the Block
can be rotated during insertion.  A full 3D point is accepted; if you omit
the Z coordinate, the current elevation is used.
\BREAK
The  BREAK  command deletes part of a Line, Trace, Circle, Arc, or
Polyline, or splits the object into two objects of the same type.

Format:     BREAK  Select object: (select one object)
            Enter first point: (point)
            Enter second point: (point)

If you break a circle, it changes to an arc by deleting the portion from
the first point to the second, going counterclockwise.  Breaking a Polyline
with nonzero width will cause the ends to be cut square.

If you select the object by pointing to it, the break is assumed
to begin at the selection point, and the next prompt is:

            Enter second point (or F for first point):

If you want to begin the break at a point where some other object
intersects with the object to be broken, choose an unambiguous point
to select the object, and then enter "f" in response to this prompt.
You can then select the beginning and ending points of the break.

See also:   "Break Command -- Partial Erase" in chapter 5 of the 
            AutoCAD Reference Manual.
\CDATE
CDATE
Calendar date/time (read-only).
\CECOLOR
CECOLOR
Current entity color (read-only).
\CELTYPE
CELTYPE
Current entity linetype (read-only).
\CHAMFER
The  CHAMFER  command trims two intersecting lines (or two adjacent
segments of a Polyline) at a given distance from their intersection and
connects the trimmed ends with a new line.   Different trim distances can
be set for the two lines, and are retained with the drawing.   If the
specified lines do not intersect, CHAMFER will extend them until they do,
and then proceed as above.  Chamfers can be applied to an entire Polyline,
chamfering all the intersections.

Format:     CHAMFER  Polyline/Distances/<select first line>:

   D - Sets chamfer distances
   P - Chamfers entire Polyline

See also:   "Chamfer Command" in chapter 5 of the AutoCAD Reference Manual.
\CHAMFERA
CHAMFERA
First chamfer distance. 
\CHAMFERB
CHAMFERB
Second chamfer distance. 
\CHANGE
The  CHANGE  command allows you to modify or change the properties
of existing objects in the drawing.

Format:     CHANGE   Select objects:  (select)
            Properties/<Change point>:

In the following descriptions, the selected CHANGE Point is abbreviated
"cp".  Note that the current object being changed is highlighted and can
be dragged as you change its location.

   Line   - Endpoint closest to CP changes to CP (ORTHO can affect this).
   Circle - Radius changes so that CP is on circumference.
   Block  - Location changes to CP.  New angle can be specified.
   Text   - Location changes to CP.  New text style, height, angle,
            and text string can be specified.
   Attribute Definition - Same as Text, plus Attribute tag can be changed.

\
The  CHANGE  command's Properties option permits you to change
any or all of the following properties of the selected objects:

   -  Layer
   -  Color
   -  Linetype
   -  Thickness

Format:     CHANGE  Selects objects:  (do so)
            Properties/<Change point>:  P
            Change what property (Color/LAyer/LType/Thickness)?

Enter the option keyword for the property you want to change.  You
can abbreviate each option to its capitalized letters.

See also:   "Change Command" in chapter 5 of the AutoCAD Reference Manual.
\CHANGE,Properties/<Change point>:
If you enter "p" for change property, any of the following properties can
be changed:
   -  Layer
   -  Color
   -  Linetype
   -  Thickness
\CHPROP
The  CHPROP  command is a subset of the CHANGE command which does not
include CHANGE <point>.  The properties which can be changed include 
color, linetype, layer, and thickness.

Format:     CHPROP Select objects:  (Select)
            Change what property (Color/LAyer/LType/Thickness) ?

Enter the option keyword for the property you want to change.  You
can abbreviate each option to its capitalized letters.

See also:   "Chprop Command -- Change Common Entity Properties" in chapter 5 
            of the AutoCAD Reference Manual.
\CIRCLE
The  CIRCLE  command is used to draw a circle.  You can specify the circle
in several ways.  The simplest method is by center point and radius.

Format:     CIRCLE  3P/2P/TTR/<Center point>:  (point)
            Diameter/<Radius>:  (radius value)

To specify the radius, you can designate a point on the circumference of
the circle or enter a radius value. If it is more convenient to enter the
diameter than the radius, reply to the "Diameter/<Radius>" prompt with "d".

The circle can also be specified using three points on the circumference
(reply "3p" when prompted for the center point), or by designating two
endpoints of its diameter (reply "2p").  For these methods, you can "drag"
the last point or specify object snap "Tangent" points.

In addition, you can draw a circle by specifying two lines (and/or other
circles) to which the circle should be tangent, and a radius.  Enter "ttr"
for this option.

See also:   "Circle Command" in chapter 4 of the AutoCAD Reference Manual.
\CLAYER
CLAYER
Current layer (read-only).
\CMDECHO
CMDECHO
When the AutoLISP (command) function is used, prompts and input are
echoed if this variable is 1, but not if it is 0.
\COLOR
\COLORS
The  COLOR  command sets the color for new entities.  Color numbers
1 through 7 have standard meanings as follows:

 1 - Red, 2 - Yellow, 3 - Green, 4 - Cyan, 5 - Blue, 6 - Magenta, 7 - White

You can control the color of each entity individually or by layer.  To change
the color of existing objects, use the  CHANGE  command.  To control layer
colors, use  LAYER.

Format:     COLOR  New entity color <current>:

You can respond with a color number from 1 to 255, or a standard color name
such as "Red".  All new entities will be drawn in this color, regardless
of which layer is current, until you again use the COLOR command.

\
If you respond with "BYLAYER", new objects you draw will inherit the
color assigned to the layer upon which they are drawn.

If you respond with "BYBLOCK", objects will be drawn in white until they are
grouped into a Block.  Then, whenever that Block is inserted, the objects
will inherit the color of the Block insertion.

See also:   "Color Command -- Set Entity Color" in chapter 7 of the 
            AutoCAD Reference Manual.
\COORDS
COORDS
If zero, coordinate display is updated on point picks only.  If 1,
display of absolute coordinates is continuously updated.  If 2,
distance and angle from last point are displayed when a distance or
angle is requested.
\COPY
The  COPY  command is used to duplicate one or more existing drawing
entities at another location (or locations) without erasing the original.

Format:     COPY  Select objects:  (select)
            <Base point or displacement>/Multiple:
            Second point of displacement:  (if base selected above)

Use any of the entity selection methods to select the objects to COPY.
Then enter an (x,y,z) displacement vector, or specify two points to indicate
how far the copied objects are to be moved.

To make multiple copies, respond to the "Base point" prompt with "m".
The "Base point" prompt then reappears, followed by repeated "Second point"
prompts.  When you have made all the copies you need, give a null response
to the "Second point" prompt.

See also:   "Copy Command" in chapter 5 of the AutoCAD Reference Manual.
\COPY,<Base point or displacement>
Enter an (x,y,z) displacement vector, or specify any point to be used as the
first of two points to "show" AutoCAD how far to move the copied object(s).
(Object snap modes can be used.)

Or, enter "m" to make multiple copies of the selected object(s).  The "Base
point" prompt reappears, followed by repeated "Second point" prompts.
To enter an (x,y,z) displacement vector when making multiple copies, enter
"0,0,0" as the base point, and the desired (x,y,z) offset as the second point
of displacement.
\COPY,Second point
Specify a second point to "show" AutoCAD the displacement from the base point.

If you entered an (x,y,z) displacement vector at the "Base point" prompt,
enter a null response to this prompt.

If you are in Multiple Copy mode and have made all the copies you need, enter
a null response to end the command.
\CVPORT
CVPORT
The identification number of the current viewport.
\DATE
DATE
Julian date/time (read-only).
\DBLIST
The  DBLIST  command produces a complete list of the contents
of the drawing database for the current drawing.  This command
is used mostly for debugging.

Format:     DBLIST

You can use CTRL S to pause, and CTRL C to cancel the listing.
If you want to echo the listing to your printer, use CTRL Q.

See also:   "Dblist Command" in chapter 5 of the AutoCAD Reference Manual.
\DDATTE
DDATTE
The  DDATTE  command lets you examine or change the values of a
Block's Attributes by means of a dialogue box.  Dialogue boxes
work only with certain display drivers.

See also:   "Ddatte Command -- Attribute Editing via Dialogue Box" in 
            chapter 9 of the AutoCAD Reference Manual.
\DDEDIT
The  DDEDIT  command allows the editing of both Text and Attribute
Definitions.  DDEDIT uses features of the Advanced User Interface (AUI),
and works only if the display device supports the AUI.  DDEDIT can be 
used in either paper space or model space, whichever is active when the
command is issued.

Format:     DDEDIT
            <Select a TEXT or ATTDEF object>/Undo:

Pick either a line of text or an attribute definition (previously defined
with the ATTDEF command).  Only point or Last selection is permitted.
DDEDIT continues to prompt for a text or attribute object after each
edit is completed.  You can use the Undo feature immediately after
completing an edit to return to the previous value.

See also:   "Ddedit Command -- Text and Attribute Editing" in chapter 5
            of the AutoCAD Reference Manual.

\DDEMODES
The  DDEMODES  command lets you change various entity drawing modes
(current layer, color, linetype, text style, elevation, and thickness)
using dialogue boxes.  Dialogue boxes work only with certain display
drivers.

See also:   "Ddemodes Command -- Current Properties Dialogue Box" in chapter 7
            of the AutoCAD Reference Manual.
\DDLMODES
The  DDLMODES  command lets you create new layers, rename existing
layers, select a different current layer, and control the visibility,
color, freeze/thaw state, and linetype assigned to existing layers, using
dialogue boxes.  Dialogue boxes work only with certain display drivers.

See also:   "Ddlmodes Command -- Layer Control Dialogue Box" in chapter 7 
            of the AutoCAD Reference Manual.
\DDRMODES
The  DDRMODES  command lets you control the settings of various
drawing aids, such as Snap, Grid, and Axis, using dialogue boxes.
Dialogue boxes work only with certain display drivers.

See also:   "Ddrmodes Command -- Drawing Aids Dialogue Box" in chapter 8 
            of the AutoCAD Reference Manual.
\DDUCS
The  DDUCS  command displays a dialogue box that provides all of the
functionality of the UCS command; you can also use it to name or rename
existing User Coordinate Systems.  Dialogue boxes work only with certain
display drivers.

See also:   "Dducs -- The UCS Dialogue Box" in chapter 8 of the 
            AutoCAD Reference Manual.
\DELAY
The  DELAY  command is used in command scripts to allow the display
to be viewed before the next command is automatically issued.  DELAY
times are designed to be approximately 1 millisecond per increment, but
are ultimately a function of the computer equipment running AutoCAD.

Format      DELAY  Delay time in milliseconds:  (number)

The larger the number, the longer the delay.

See also:   "Command Scripts" in chapter 11 of the AutoCAD Reference Manual.
\DIM
The  DIM  command enters Dimensioning mode.  The commands allowed
during Dimensioning mode are listed next.  Each can be abbreviated
to the capital letters shown.  A space or RETURN will repeat the
previous DIM subcommand.

   ALigned     - Linear dimensioning, aligned with extension line origins
   ANgular     - Angular dimensioning
   Baseline    - Continues from 1st extension line of previous dimension
   CEnter      - Draws center mark or center lines
   COntinue    - Continues from 2nd extension line of previous dimension
   Diameter    - Diameter dimensioning
   Exit        - Returns to normal command mode
   HORizontal  - Linear dimensioning, horizontal dimension line
   Leader      - Draws a leader to the dimension text
   ORdinate    - Ordinate point dimensioning
   RAdius      - Radius dimensioning

\
   REDraw      - Redraws the display
   REStore     - Changes to previously stored dimension style
   ROtated     - Linear dimensioning at specified angle
   SAve        - Stores the current variable settings as a dimension style
   STAtus      - Lists dimensioning variables and their values
   STYle       - Switches to a new text style
   Undo        - Erases the annotation drawn by the last dimensioning command
   VErtical    - Linear dimensioning, vertical dimension line

\
If the DIMASO dimensioning variable is on, the linear, angular, ordinate,
diameter, and radius dimensioning commands generate a single Dimension 
entity, as opposed to separate lines, arcs, arrows, and text.

The following dimensioning commands operate on a selection set of existing 
Dimension entities.

   HOMetext    - Moves the Dimension text back to its home (default) position
   Newtext     - Modifies the text of the Dimensions
   OBlique     - Sets the obliquing angle of Dimension extension lines
   OVerride    - Overrides a subset of the Dimension variable settings
   TEdit       - Changes the position of the Dimension text
   TRotate     - Rotates the Dimension text
   UPdate      - Redraws the Dimensions as directed by the current settings
                 of all dimensioning variables
   VAriables   - Lists variable settings

See also:   "Dim and Dim1 Commands" in chapter 10 of the AutoCAD Reference 
            Manual.
\DIM,Dim:
The  DIM  command is currently active.
To return to normal command mode, use the  EXIT  command.
\DIM1
The  DIM1  command allows you to execute one dimensioning command, and
then returns to normal command mode.

Format:     DIM1  Dim:   (enter dimensioning command)

See also:   "Dim and Dim1 Commands" in chapter 10 of the AutoCAD Reference 
            Manual.

\DIMALT
DIMALT
If on, enables alternate units dimensioning.  See also DIMALTF, DIMAPOST,    
DIMALTD, and the example in the "Alternate Units Dimensioning" section in
chapter 10 of the AutoCAD Reference Manual.  
\DIMALTD 
DIMALTD
If the associated DIMALT variable is on, DIMALTD governs the number of decimal
places used to edit the alternate measurement.  
\DIMALTF 
DIMALTF 
If the associated DIMALT variable is on, all linear dimensions will be 
multiplied by this factor to produce a value in an alternate system of 
measurement.  
\DIMAPOST 
DIMAPOST 
This variable defines a character string to be edited following an alternate 
dimensioning measurement for all types of dimensions except angular dimensions.
For instance, if the current Units mode is Architectural, DIMALT is on, DIMALTF
is 25.4, DIMALTD is 2, and DIMAPOST is set to "mm", a distance of 10 units 
would be edited as:

                10"[254.00mm]

To disable an established suffix, set it to a single period (.).
\DIMASO
DIMASO
Controls the creation of associative Dimension entities.  When DIMASO is off,
the lines, arcs, arrows, and text that make up a dimension are drawn as 
separate entities.  When it is on, the elements of the dimension are formed 
into a single entity that remains associated with the geometry used to define 
it.  The DIMASO value is not stored in a dimension style.
\DIMASZ
DIMASZ
This specifies the size of the arrows drawn at the ends of dimension lines. 
Multiples of the arrow size are used to determine whether dimension lines and 
text will fit between the extension lines. This variable is also used to scale
arrow Blocks if set by the DIMBLK variable. DIMASZ has no effect when DIMTSZ 
is other than zero.
\DIMBLK
DIMBLK
This is the name of a Block to be drawn instead of the normal arrow at the ends 
of the dimension line. (See section "Arrow Blocks" in chapter 10 of the AutoCAD 
Reference Manual.)  To disable an established Block name, set it to a single 
period (.).
\DIMBLK1
\DIMBLK2
DIMBLK1
DIMBLK2
If DIMSAH is on, DIMBLK1 and DIMBLK2 specify user-defined arrow Blocks for the 
first and second ends of the dimension line. These variables contain the names 
of previously defined Blocks (just as for DIMBLK). (See the section on "Arrow 
Blocks" in chapter 10 of the AutoCAD Reference Manual.) To disable an 
established Block name, set it to a single period (.).
\DIMCEN
DIMCEN
This variable controls the drawing of Circle/Arc center marks and center lines 
by the Center, Diameter, and Radius commands. If zero, center marks/lines are 
not drawn. If DIMCEN is greater than zero, the value specifies the size of the
center mark. If DIMCEN is negative, center lines are drawn rather than center 
marks; the absolute value specifies the size of the mark portion of the center
line. (For Radius and Diameter, the center mark/line is drawn only if the 
dimension line is placed outside the Circle or Arc.).
\DIMCLRD
DIMCLRD
The color assigned to dimension lines, arrowheads, and dimension line leaders.
It can take on any valid color number, or the special color labels BYBLOCK or 
BYLAYER. From the DIM: prompt, you can set the color values by entering any of
the standard color names or the special names BYBLOCK and BYLAYER. From the 
SETVAR command, you must supply the integer color number. The integer 
equivalents for BYBLOCK and BYLAYER are 0 and 256 respectively.
\DIMCLRE
DIMCLRE
The color assigned to dimension extension lines. It can take on any valid color
number, or the special color labels BYBLOCK or BYLAYER. (See the description of
DIMCLRD.) 
\DIMCLRT
DIMCLRT
The color assigned to dimension text. It can take on any valid color number, or
the special color labels BYBLOCK or BYLAYER. (See the description of DIMCLRD.)
\DIMDLE
DIMDLE
When ticks are drawn instead of arrows (that is, when DIMTSZ is nonzero), the 
dimension line will extend past the extension line by the DIMDLE amount.
\DIMDLI
DIMDLI
This variable controls the dimension line increment for continuation of linear 
dimensioning with the Baseline and Continue commands. Successive continuations 
are offset by this amount, if necessary, to avoid drawing over the previous 
dimension.
\DIMEXE
DIMEXE
This specifies how far the extension line should extend beyond the dimension 
line.
\DIMEXO
DIMEXO
The extension lines are offset this amount from the origin points you specify. 
Thus, you can point directly at the corners of an object to be dimensioned, 
but the extension lines will stop just short of the object.
\DIMGAP
DIMGAP
The distance maintained around the dimension text when you break the dimension
line to accommodate the dimension text. You can also use DIMGAP as the minimum 
length required for pieces of the dimension line. When AutoCAD calculates the 
default position for the dimension text, it positions the text inside the 
extension lines only if doing so breaks the dimension lines into two segments 
at least as long as DIMGAP. If the text is positioned above or below the 
dimension line, it is placed inside if there is room for two arrows and a 
margin size 2 * (DIMASZ + DIMGAP).
\DIMLFAC
DIMLFAC
This serves as a global scale factor for linear dimensioning measurements. All
linear distances measured by dimensioning (including radii, diameters, and 
coordinates) are multiplied by the current setting of DIMLFAC before being 
edited into the dimension text. DIMLFAC affects the content of the default 
text. DIMLFAC has no effect on angular dimensions and it is not applied to the 
values held in DIMTM, DIMTP, or DIMRND. 
DIMLFAC has a special meaning when dimensioning in paper space. If DIMLFAC is 
set to a value less than zero and you are creating a dimension in paper space, 
the distance measured is multiplied by the absolute value of DIMLFAC.  If you 
are creating a dimension in model space, negative values are ignored and the 
value of 1.0 is used instead.  AutoCAD will compute a value for DIMLFAC for 
you if you attempt to change DIMLFAC from the Dim: prompt while in paper space 
and you select the Viewport option:

   Dim: dimlfac
   Current value <1.000> New value (Viewport): V
   Select viewport to set scale:

AutoCAD calculates the scaling of model space to paper space, and assigns the
negative of this value to DIMLFAC.
\DIMLIM
DIMLIM
If on, generates dimension limits as the default text.
Setting DIMLIM on forces DIMTOL to be off.
\DIMPOST
DIMPOST
This variable defines a character string to be edited following the dimension 
measurement (but preceding any individual suffix specified by the <> 
mechanism). This suffix is applied to all types of dimensions except angular 
dimensions. For instance, if DIMPOST is set to "mm", a distance of 19.2 units 
would be edited like this: 

                19.2mm

If tolerances are enabled, the suffix is applied to the tolerances as well as 
to the main dimension, like this:

                                            +0.20mm
        12.9mm + or - 0.2mm    or   19.2mm  -0.20mm 

To disable an established suffix, set it to a single period (.).
\DIMRND
DIMRND
This variable is used for rounding all dimensioning distances.  For instance, 
if DIMRND is set to 0.25, all distances are rounded to the nearest 0.25 unit. 
Similarly, if you set DIMRND to 1.0, AutoCAD rounds all dimension distances 
to the nearest integer. Note that the number of digits edited after the decimal
point depends on the precision set by the UNITS command. DIMRND does not apply 
to angular dimensions.
\DIMSAH
DIMSAH
If DIMSAH is on, DIMBLK1 and DIMBLK2 specify different user-defined arrow 
Blocks to be drawn at the two ends of the dimension line. (See the section 
"Separate Arrow Blocks" in chapter 10 of the AutoCAD Reference Manual).
\DIMSCALE
DIMSCALE
This is the overall scale factor applied to all dimensioning variables that 
specify sizes, distances, or offsets. It is not applied to tolerances or to 
measured lengths, coordinates, or angles. If DIMSCALE is set to 0.0, AutoCAD 
computes a reasonable default value based on the scaling between the current 
model space viewport and paper space. If you are in paper space, or are not 
using the paper-space feature, AutoCAD uses a scale factor of 1.0. Otherwise, 
AutoCAD computes a scale factor that leads to text sizes, arrow sizes, and 
other scaled distances to plot at their face values.
\DIMSE1
DIMSE1
If on, suppresses drawing the first extension line.
\DIMSE2
DIMSE2
If on, suppresses drawing the second extension line.
\DIMSHO
DIMSHO
Controls redefinition of Dimension entities while dragging. If DIMSHO is on, 
associative dimensions will be recomputed dynamically when they are dragged. 
DIMSHO is ignored and dynamic dragging is used during Radius and Diameter 
leader length input. On some computers, dynamic dragging might be unacceptably 
slow, so you can set DIMSHO off to drag the original image instead.   The 
DIMSHO value is not stored in a dimension style.
\DIMSOXD
DIMSOXD
DIMSOXD prevents AutoCAD from drawing dimension lines outside the extension 
lines. If AutoCAD would normally draw the dimension lines outside the extension 
lines and DIMTIX is on, setting DIMSOXD on suppresses the dimension line 
entirely. If DIMTIX is off, DIMSOXD has no effect.
\DIMTAD
DIMTAD
Controls vertical placement of the text relative to the dimension line. It 
takes effect when dimension text is drawn between the extension lines and at 
the same angle as the dimension line, or when the dimension text is placed 
outside the extension lines. If DIMTAD is on, the text is placed above the 
dimension line and a single solid dimension line is drawn beneath it. If DIMTAD
is off, DIMTVP controls the text vertical placement.
\DIMTFAC
DIMTFAC
The scale factor applied to the text height of tolerance values in dimension 
text. Used for plus and minus tolerance strings when DIMTOL is on and DIMTM is
not equal to DIMTP, or when DIMLIM is on.
\DIMTIH
DIMTIH
Controls the orientation of dimension text for Linear, Radius, and Diameter 
dimensioning where the text fits between the extension lines. If on, the text
is always drawn horizontally. If off, the text is aligned with the dimension 
line.
\DIMTIX
DIMTIX
If DIMTIX is on, the dimension text is drawn between the extension lines even 
if AutoCAD would ordinarily place it outside those lines. If it is off, the 
result varies with the type of dimension. For Linear and Angular dimensions, 
AutoCAD will place the text inside the extension lines if there is sufficient 
room. See the discussion of the DIMGAP variable in "Dimensioning Variables,"
chapter 10, on when AutoCAD decides there is sufficient room. For Radius and 
Diameter dimensions, setting DIMTIX off forces the text outside the circle or 
arc.
\DIMTM
\DIMTP
DIMTM
DIMTP
These variables hold the dimension tolerance/limit values (drawn only when 
DIMTOL or DIMLIM is on). DIMTP specifies the upper tolerance and DIMTM 
specifies the lower tolerance. AutoCAD accepts signed values for DIMTP and 
DIMTM. If DIMTOL is on and DIMTP and DIMTM are set to the same value, AutoCAD 
draws a plus-minus symbol followed by the tolerance value. If the DIMTP and 
DIMTM values differ, the upper tolerance is drawn above the lower.
When the tolerance values differ, a "+" sign is added to the DIMTP value if it
is positive. For DIMTM, AutoCAD uses the negative of the value you enter 
(adding a "-" sign if you specify a positive number, and substituting a "+" 
sign if you specify a negative number). No sign is added to a value of zero, 
however.
\DIMTOFL
DIMTOFL
If DIMTOFL is on, a dimension line is drawn between the extension lines even 
when the text is placed outside the extension lines. For Radius and Diameter 
dimensions, setting DIMTOFL on while DIMTIX is off causes a dimension line and 
arrowheads to be drawn inside the circle or arc, while the text and leader are 
drawn outside.
\DIMTOH
DIMTOH
Same as DIMTIH, except that it controls text drawn outside the extension lines.
\DIMTOL
DIMTOL
If on, appends dimension tolerances to the default text. Setting DIMTOL on 
forces DIMLIM to be off.
\DIMTSZ
DIMTSZ
This variable specifies the size of the ticks drawn instead of arrows for 
linear, radius, and diameter dimensioning. If the value is zero, arrows are 
drawn. If the value is other than zero, ticks of the size DIMTSZ * DIMSCALE 
are drawn instead of arrows. Also used to determine if dimension lines and 
text will fit between extension lines.
\DIMTVP
DIMTVP
This variable allows you to adjust the vertical position of the dimension text 
above or below the dimension line. DIMTVP is used under the same circumstances
as DIMTAD to adjust the vertical position of the dimension text. AutoCAD uses 
the DIMTVP value when DIMTAD is off. The magnitude of the vertical offset of 
the text is the product of the text height and DIMTVP. Setting DIMTVP to 1.0 is 
equivalent to setting DIMTAD on. AutoCAD splits the dimension line to 
accommodate the text only if the absolute value of DIMTVP is less than 0.7.
\DIMTXT
DIMTXT
This specifies the height of the dimension text, unless the current text 
style has a fixed height.
\DIMZIN
DIMZIN
This variable lets you suppress the inches portion of a feet-and-inches 
dimension when the distance is an integral number of feet, or the feet portion 
when the distance is less than one foot.

If feet are being included and a fractional inch component exists, the number 
of inches is included even if zero, no matter how DIMZIN is set. Thus, a 
dimension like 4'-3/4" never occurs; it is edited as 4'-0 3/4".

DIMZIN values 0-3 affect feet-and-inch dimensions only, but you can add 4 to 
suppress leading zeroes in all decimal dimensions (e.g., 0.5000 becomes .5000),
and add 8 to suppress trailing decimal zeroes (e.g., 12.5000 becomes 12.5 and 
30.0000 becomes 30). Adding 12 (both 4 and 8) suppresses both leading and 
trailing zeroes (e.g., 0.5000 becomes .5 and 0.0000 becomes 0).

Note:   DIMZIN also affects real-to-string conversions performed by the 
AutoLISP (RTOS) and (ANGTOS) functions.

\DIST
The  DIST  command displays the 3D distance (in drawing units), the angle
in the X-Y plane, the angle from the X-Y plane, and the delta-X/Y/Z between
two designated points.

Format:     DIST  First point:  (point)
            Second point:  (point)

If a single number is entered in response to the "First point:" prompt,
DIST displays that number in the current UNITS format.

See also:   "Dist Command" in chapter 5 of the AutoCAD Reference Manual.
\DISTANCE
DISTANCE
Distance computed by DIST command (read-only).
\DIVIDE
The  DIVIDE  command allows you to divide an entity into a specified number 
of equal-length parts, placing markers along the objects at the dividing 
points.

Format:     DIVIDE  Select object to divide:  (point)
            <Number of segments>/Block:

You can select a single Line, Arc, Circle, or Polyline.  If you enter a
segment count between 2 and 32,767, Point entities will be placed along
the object to divide it into that number of equal segments.  You can
request a specific Block to be inserted instead of the Point entities
by responding to the second prompt with "b".  AutoCAD will ask:

            Block name to insert:
            Align block with object? <Y>
            Number of segments:

The Block must currently be defined within the drawing.  If you answer
"yes" to the "Align block?" prompt, the Block will be rotated around its
insertion point so that it is drawn tangent to the object being divided.

\
After all prompts are answered, AutoCAD will divide the object, drawing
Point entities, or the specified Block at each junction between the equal
segments.

See also:   "Divide Command" in chapter 5 of the AutoCAD Reference Manual.
\DIVIDE,Select object to divide
You can select a single Line, Arc, Circle, or Polyline.  
\DIVIDE,<Number of segments>/Block
Enter the number of segments (between 2 and 32,767) to DIVIDE the entity into.
Point entities will be placed along the entity at the dividing points.

Or, enter "b" to specify a Block to insert at the dividing points.
\DIVIDE,Block name to insert
Enter the name of the Block to insert at the entity's dividing points.  The
Block must be defined within the current drawing.  If the Block has variable
Attributes, they are not included in these insertions.
\DIVIDE,Align block with object
Enter "y" (or simply press RETURN) to rotate the Blocks as they are inserted
so that their horizontal lines are aligned (drawn tangent to) the object being
divided.

Or, enter "n" to always insert the Blocks with a zero rotation angle.
\DIVIDE,Number of segments
Enter the number of segments (2 to 32,767) to DIVIDE the entity into.
\DOUGHNUT
\DONUT
The  DOUGHNUT  (or DONUT) command draws a filled circle or ring.

Format:     DOUGHNUT  Inside diameter <last>:  (value or two points)
            Outside diameter <last>:  (value or two points)
            Center of doughnut:  (enter point)

The "Center of doughnut" prompt is repeated for multiple locations of the
doughnuts.  A null response ends the DOUGHNUT command.

The  DOUGHNUT  command constructs a closed Polyline (composed of wide
arc segments) representing the specified object.  Consequently, you can
edit the resulting doughnut with PEDIT or any of the other editing
commands that operate on Polylines.  The solid-filling of doughnuts
is subject to Fill mode.

See also:   "Doughnut Command -- Filled Circles and Rings" in chapter 4 of the 
            AutoCAD Reference Manual.
\DRAG
\DRAGMODE
When Drag mode is on, you can draw certain entities (Circles, Arcs, Polylines, 
Blocks, and Shapes) dynamically, "dragging" them into position on the screen.
Also, many of the editing commands can drag any existing object.  Dragging is 
turned on by entering the word "drag" at appropriate points in the command 
prompt sequence.

With some computer configurations, the dragging process might be time 
consuming.

Format:     DRAGMODE  ON/OFF/Auto <current>:

When Drag mode is off, all Drag requests are ignored, including those
embedded in menu items.  When Drag mode is on, dragging is permitted, and
Drag requests are honored when appropriate.

If you set Drag mode to Auto, dragging is enabled for every command that
supports it.  Dragging will be performed whenever possible, without the
need to enter "drag" each time.

See also:   "Dragmode Command" in chapter 6 of the AutoCAD Reference Manual.

\
The following Dragmode options can also be set through the SETVAR command:
   
   0 = No dragging 
   1 = On if requested
   2 = Auto

\DRAGP1
DRAGP1
Regen-drag input sampling rate.
\DRAGP2
DRAGP2
Fast-drag input sampling rate.
\DTEXT
The  DTEXT  command is similar to the TEXT command and begins by prompting 
for the same information as the TEXT command.  However, once you've entered
the text location, height, and rotation angle, DTEXT draws the text on the 
screen character by character as you enter it.  A rectangular text cursor 
is displayed to help you see where you are.  You can use the BACKSPACE key 
to back up and correct typing errors.

When you finish a line of text, press the RETURN key.  The "Text:" prompt
reappears, the text cursor advances, and you can draw another line of text
below the previous line.  You can also begin a new line of text by using
your pointing device to designate a new starting point.  This terminates
the current line of text (if any), moves the text cursor to the point you
designated, and repeats the "Text:" prompt to let you start a new line.
When you are satisfied with all the new lines of text, give a null response
to the "Text:" prompt to end the DTEXT command.

DTEXT works best with left-justified text.  When you use other types of
justification, DTEXT draws the text left-justified, and performs the
requested justification when you give a null response to end the command.

See also:   "Dtext Command" in chapter 4 the AutoCAD Reference Manual.
\DVIEW
The  DVIEW  command lets you define parallel or visual perspective views of
your drawing dynamically.  It allows you to:

   - Look at objects with true visual perspective 
   - Remove hidden lines in your drawing 
   - Position front and back clipping planes 
   - Toggle back and forth between perspective and parallel views 
   - Specify a camera point, target point, and lens length 

\
Format:     DVIEW
            Select objects:  (Select entities)
       CAmera/TArget/Distance/POints/PAn/Zoom/TWist/CLip/Hide/Off/Undo/<eXit>:

The various options are described next:

   CAmera     - Selects the camera angle relative to the target 
   CLip       - Sets the front and back clipping planes 
   Distance   - Sets distance between camera and target, turn on perspective 
   eXit       - Exits the DVIEW command 
   Hide       - Performs hidden-line removal on the selection set 
   Off        - Turns perspective off 
   PAn        - Pans drawing across the screen 
   POints     - Specifies the camera and target points 
   TArget     - Selects the target angle relative to the camera 
   TWist      - Sets the view twist angle 
   Undo       - Undoes a view subcommand 
   Zoom       - Zooms in and out on drawing 

\
If you select the CLip option, AutoCAD prompts:

            Back/Front/<Off>:

   Back       - Positions the back clipping plane 
   Front      - Positions the front clipping plane 
   Off        - Turns off front and back clipping planes 

See also:   "Dview Command -- Dynamic 3D and Perspective Views" in chapter 6 
            of the AutoCAD Reference Manual.
\DWGNAME
DWGNAME
Drawing name as entered by the user.  If the user specified a drive/directory 
prefix, it is included as well (read-only).
\DWGPREFIX
DWGPREFIX
Drive/directory prefix for drawing (read-only).
\DXBIN
The  DXBIN  command loads a ".dxb" (drawing interchange binary) file into an
AutoCAD drawing.   These files have a very compact format and are mainly for 
internal use by programs such as CAD/camera (tm).

Format:     DXBIN  DXB file:  (filename)

Do not enter the ".dxb" file type; it is assumed.

See also:   appendix C of the AutoCAD Reference Manual.
\DXFIN
The  DXFIN  command reads a drawing interchange file and creates or
appends a drawing from it.  If you want to DXFIN a whole drawing, create
a new drawing using Main menu task 1, and issue the DXFIN command before
drawing anything.

Format:     DXFIN  File name <default>: (name)

If AutoCAD determines that the current drawing is not empty, it prints
the message

      Not a new drawing -- only ENTITIES section will be input.

and proceeds to ignore all sections of the input file other than the
ENTITIES section.

See also:   appendix C of the AutoCAD Reference Manual.
\DXFOUT
The  DXFOUT  command creates a drawing interchange file from the current
drawing or from selected entities in the drawing.

Format:     DXFOUT  File name <default>: (name or RETURN)
            Enter decimal places of accuracy (0 to 16)/Entities/Binary <6>:

If you respond with "e", the normal "Select objects:" prompt appears, and
you can select the set of entities to be output.  You are then again
prompted with:

            Enter decimal places of accuracy (0 to 16) <6>:

If you select the Binary option, the output is written to a binary DXF file.

See also:   appendix C of the AutoCAD Reference Manual.
\EDGESURF
The  EDGESURF  command constructs a Coons surface patch from four adjoining
space curve edges.

Format:     EDGESURF
            Select edge 1:  (Select an edge)
            Select edge 2:  (Select an edge)
            Select edge 3:  (Select an edge)
            Select edge 4:  (Select an edge)

The four adjoining edges that you select can be lines, arcs, or open 2D or 3D 
Polylines, and must touch at their endpoints to form a topologically 
rectangular closed path.  The edges can be selected in any order; however, 
the first edge selected generates the M direction, and the two edges which 
touch the first edge generate the N direction of the mesh.

The system variable SURFTAB1 controls the number of tabulation lines generated
in the M direction, while SURFTAB2 controls the number of tabulations 
generated in the N direction.

See also:   "Edgesurf Command -- Edge-Defined Surface Patches" in chapter 4 
            of the AutoCAD Reference Manual.
\ELEV
The  ELEV  command allows you to specify the current elevation and extrusion
thickness for subsequently drawn objects.   The elevation is the Z plane on
which an object's base is drawn, while its extrusion thickness is its height
above that base elevation.  Negative thickness extrudes downward.

Different elevations can be maintained between model space and paper space.

Format:     ELEV
            New current elevation <current>:  (RETURN or number)
            New current thickness <current>:  (RETURN or number)

The UCS command is the recommended method of changing the current Z value.

See also:   "Elev Command -- Set Current Elevation and Thickness" in chapter 7
            of the AutoCAD Reference Manual.

\ELEVATION
ELEVATION
Current 3D elevation, relative to the current UCS for the current space.
\ELLIPSE
The  ELLIPSE  command allows you to draw ellipses.

Format:     ELLIPSE  <Axis endpoint 1>/Center:  (point)
            Axis endpoint 2:  (point)
            <Other axis distance>/Rotation:

If you enter a distance to the "<Other axis distance>/Rotation" prompt,
AutoCAD interprets it as half the length of the other axis.  If you reply
with "r", the first axis is assumed major and AutoCAD prompts:

            Rotation around major axis:

The major axis is now treated as the diameter line of a circle which will
be rotated a specified amount around the axis, into the third dimension.
You can enter a rotation angle between 0 and 89.4 degrees.

If you respond to the "<Axis endpoint 1>/Center" prompt with "c", AutoCAD
prompts for the center point, and one endpoint of each axis.  The
"<Other axis distance>/Rotation:" prompt appears for this method also,
so you can specify the ellipse's rotation rather than the second axis.

\
If you have selected isometric Snap mode, ELLIPSE allows you to draw a
circle in the current isometric drawing plane.  The dialogue for this is:

          ELLIPSE  <Axis endpoint 1>/Center/Isocircle:  I
          Center of circle:  (point)
          <Circle radius>/Diameter:  (radius distance or "d")

The "Center of circle" is the center point of the original circle as
projected into the isometric drawing plane.  The radius or diameter is
the radius or diameter of the original circle as it would appear in a
face-on projection.

You can enter the radius numerically or by designating a point to "show"
AutoCAD the radius as a distance from the circle's center point.  You
can "drag" the radius if you like.

See also:   "Ellipse Command" in chapter 4 of the AutoCAD Reference Manual.
\END
The  END  command exits the drawing editor (after saving the updated
version of the current drawing), and returns to the Main menu.  If you
then want to exit AutoCAD entirely, select item 0 from the Main menu.

Format:     END

See also:   "End Command" in chapter 3 of the AutoCAD Reference Manual.
\ERASE
The  ERASE  command lets you delete selected entities from the drawing.

Format:     ERASE  Select objects:  (select)

You can easily erase just the last object you drew by responding to
the "Select objects" prompt with "l".

The  OOPS  command can be used to retrieve the last thing you erased.

See also:   "Erase Command" in chapter 5 of the AutoCAD Reference Manual.
\EXPERT
EXPERT
Controls the issuance of certain "Are you sure?" prompts, as indicated 
next.

   0  =  Issues all prompts normally.
   1  =  Suppresses "About to regen, proceed?" and "Really want to turn
         the current layer off?".
   2  =  Suppresses the preceding prompts and Block's "Block already
         defined.  Redefine it?" and Save/Wblock's "A drawing with
         this name already exists.  Overwrite it?".
   3  =  Suppresses the preceding prompts and those issued by LINETYPE
         if you try to load a linetype that's already loaded or create a
         new linetype in a file that already defines it.
   4  =  Suppresses the preceding prompts and those issued by UCS Save
         and VPORTS Save if the name you supply already exists.
   5  =  Suppresses the preceding prompts and those issued by DIM Save 
         and DIM OVerride if the dimension style name you supply already 
         exists (the entries are redefined).

When a prompt is suppressed by EXPERT, the operation in question is performed 
as though you had responded "y" to the prompt.  In the future, values greater 
than 5 might be used to suppress additional safety prompts.  The default value 
is 0.

\EXPLODE
The  EXPLODE  command replaces a Block reference with copies of the simple 
entities comprising the Block, forms simple lines and arcs from a Polyline, 
forms individual lines, arrows, and text entities from an Associative 
Dimension entity, or replaces a polygon mesh with 3D Face entities.

Format:     EXPLODE
            Select block reference, polyline, dimension, or mesh:

When a Block or Dimension is exploded, the resulting image on the screen
is identical, except that the color and linetype of entities might change
due to floating layers, colors, or linetypes.  Therefore, be careful to
select the desired object.

When a Polyline is exploded, any associated width or tangent information
is discarded and the resulting lines and arcs follow the Polyline's
center line.

See also:   "Explode Command" in chapter 5 of the AutoCAD Reference Manual.
\EXTEND
The  EXTEND  command allows you to lengthen existing objects in a drawing so 
that they end precisely at a boundary defined by one or more other objects 
in the drawing.

Format:     EXTEND  Select boundary edge(s)...
            Select objects:

You can use any form of entity selection to define the boundary objects.
Lines, Arcs, Circles, and 2D Polylines can serve as boundary objects.
When using a 2D Polyline as a boundary, its width information is ignored
so that objects are extended to its center line.

\
All the selected edges are highlighted and will remain highlighted for
the rest of the  EXTEND  command.  Next the prompt:

            <Select object to extend>/Undo:

appears.  Pick objects to extend by pointing to the part of the object to
be extended.  Entering the Undo subcommand undoes the most recent change, back
to the first change made during the current EXTEND command.  Answer with 
RETURN to end the command.  Lines, Arcs, and open 2D Polylines can be 
extended.

See also:   "Extend Command" in chapter 5 of the AutoCAD Reference Manual.
\EXTEND,Select objects
You can use any form of entity selection to define the boundary objects.
Lines, Arcs, Circles, and 2D Polylines can serve as boundary objects.
When using a 2D Polyline as a boundary, its width information is ignored
so that objects are extended to its center line.

All the selected edges are highlighted and will remain highlighted for
the rest of the  EXTEND  command.

\EXTMAX
EXTMAX
Upper-right drawing uses extents.  Expands outward as new objects are drawn, 
shrinks only by ZOOM All or ZOOM Extents.  Reported in World coordinates for 
the current space (read-only).
\EXTMIN
EXTMIN
Lower-left drawing uses extents. Expands outward as new objects are drawn, 
shrinks only by ZOOM All or ZOOM Extents. Reported in World coordinates for 
the current space (read-only).
\FILEDIA
FILEDIA
Controls use of File Dialogue Boxes:

  1 = Use file dialogue boxes if possible
  0 = Don't use file dialogue boxes unless requested via ~ (tilde)

\FILES
The  FILES  command is used to access disk file directories.

Format:     FILES

This invokes the File Utility menu, which displays a list of subtasks.
Using this menu, you can list the names of files on disk, delete
selected files, rename a file, or copy a file to another file.

When listing user-specified files or deleting files, you can use the "*"
and "?" wild-card characters.  "?" matches any character in that position,
and "*" matches all characters up to a period, or to the end of the name.
Thus, "*.*" means all files.

See also:   "File Command -- Directory Access" in chapter 3 of the AutoCAD 
            Reference Manual.
\FILL
The  FILL  command controls whether Solids, Traces, and wide Polylines
are to be solid-filled or just outlined.

Formats:    FILL  ON/OFF <ON>:

See also:   "Fill Command" in chapter 6 of the AutoCAD Reference Manual.
\FILLET
The  FILLET  command connects two lines, arcs, or circles with a smooth
arc of specified radius.  It adjusts the lengths of the original lines
or arcs so they end exactly on the fillet arc.  If the Polyline option
is used, you can apply fillets to an entire Polyline, or remove the
fillets from a Polyline.

Format:     FILLET  Polyline/Radius/<select two objects>:

   P - Fillets an entire Polyline
   R - Sets the fillet radius

See also:   "Fillet Command" in chapter 5 of the AutoCAD Reference Manual.
\FILLET,Polyline/Radius/<select     
Enter "p" to fillet an entire Polyline.  Enter "r" to set the fillet radius.
Or select 2 entities to fillet.
\FILLET,Select
The  FILLET  command is asking you to pick a 2D Polyline to fillet.
\FILLET,Enter
The  FILLET  command is asking you to enter a number (or pick two points)
to define the fillet radius.
\FILLETRAD
FILLETRAD
Fillet radius.
\FILLMODE
FILLMODE
Fill mode on if 1, off if 0.
\FILMROLL
FILMROLL
The  FILMROLL  command lets you produce a file for use by the AutoShade
shaded rendering package.

Format:     FILMROLL  Enter filmroll file name <default>:

Enter the name of the filmroll file you want to create.  The name of the 
current drawing is offered as the default.  Do not include a file type in 
your response; file type ".flm" is assumed.

See also:   "Filmroll Command -- Produce File for AutoShade" in chapter 11 of 
            the AutoCAD Reference Manual and The AutoShade User Guide.
\FRONTZ
FRONTZ
Front clipping plane offset for the current viewport, in drawing units.  
Meaningful only if the front clipping bit in VIEWMODE is on and the front 
clip not at eye bit is also on.  The distance of the front clipping plane 
from the camera point can be found by subtracting FRONTZ from the 
camera-to-target distance (read-only).
\GRID
The  GRID  command controls the display of a grid of alignment dots to assist
in the placement of objects in the drawing.

Format:     GRID  Grid spacing(X) or ON/OFF/Snap/Aspect <current>:

The various options are described next.

    Spacing(X)  - A simple number sets grid spacing in drawing
                  units.  A number followed by "X" (e.g., "2X")
                  sets the grid spacing to a multiple of the current
                  snap resolution.  A value of zero locks the grid
                  spacing to the current snap resolution.
    ON          - Turns grid on with previous spacing.
    OFF         - Turns grid off.
    Snap        - Locks the grid spacing to the current snap
                  resolution (same as a spacing value of zero).
    Aspect      - Permits a grid with different
                  horizontal and vertical spacing.

See also:   "Grid Command" in chapter 8 of the AutoCAD Reference Manual.
\GRIDMODE
GRIDMODE
1 = grid on for current viewport; 0 = grid off.
\GRIDUNIT
GRIDUNIT
Grid spacing for current viewport, X and Y.
\HANDLES
The  HANDLES  command controls the assignment of handles.  A handle is a 
unique number which has been permanently assigned to an entity.  When you 
enter the HANDLES command the current status is displayed, and if handles 
are enabled, the next handle number is displayed.

Format:     HANDLES
            Handles are disabled.
            ON/DESTROY:

The various options are described next.

    ON       - Assigns handles to every entity currently in the database
               and every entity subsequently added to the drawing.  It
               also sets the system variable HANDLES to 1.
    DESTROY  - Deletes all handles in the database.  Warning - this
               invalidates all links into the drawing from external
               databases.

\
The status of HANDLES can be determined by viewing the handles system 
variable via the SETVAR command.  If 0, handles are disabled.  If 1, handles
are on.  The handles system variable is read-only and can only be set by the
HANDLES command.

See also:   "Handles Command -- Entity Handle Control" in chapter 7 of the 
            AutoCAD Reference Manual.

\HATCH
The  HATCH  command is used to crosshatch or pattern-fill an area.

Format:     HATCH  Pattern (? or name/U,style) <default>:

    ?     - Lists the standard hatch patterns in "acad.pat".
    name  - Name of a hatch pattern. You are prompted for a scale and
            an angle for the pattern.
    U     - Allows you to define a simple pattern on the fly. You are
            prompted for an angle, the spacing between the lines, and
            a single or double hatch area.
    style - Defines what areas of the selected items are to be filled
            with the specified pattern.

                 Style codes                     Example

            N - Normal                        BRICK,N  or U,N
            O - Outermost area only           BRICK,O  or U,O
            I - Ignore internal structure     BRICK,I  or U,I

\
The specified parameters are remembered and are displayed as the defaults
for subsequent HATCH commands.

See also:   "Hatch Command" in chapter 10 of the AutoCAD Reference Manual.

\HELP
\?
The  HELP  (or "?")  command displays help information.

Formats:    HELP (or "?")
            Command name (RETURN for list):

If you reply with a command name, information about that command is
displayed.  Otherwise, the display consists of a list of valid commands,
and a brief reminder of the methods of point specification.

If the help information does not fit on one screen, AutoCAD will pause
and display:

            Press RETURN for further help.

To continue the help display, press RETURN.  If you want to cancel
the help display, enter CTRL C.

See also:   "Help Command -- User Assistance" in chapter 3 of the AutoCAD 
            Reference Manual.
\HIDE
The  HIDE  command eliminates "hidden" lines.  When the VPOINT command is
used to generate a 3D view, it is in "wireframe" form; that is, all
lines are drawn, even those that would be hidden by other objects.  HIDE,
which has no parameters, regenerates the drawing with the "hidden" lines
suppressed.

Format:     HIDE

See also:   "Hide Command -- Hidden Line Suppression" in chapter 6 of the 
            AutoCAD Reference Manual.
\HIGHLIGHT
HIGHLIGHT
Object selection highlighting on if 1, off if 0.
\ID
The  ID  command displays the coordinates of a designated point in the drawing.

Format:     ID  Point:  (point)

See also:   "Id Command" in chapter 5 of the AutoCAD Reference Manual.
\IGESIN
The  IGESIN  command reads an IGES ASCII format file and creates a
drawing from it.  Create a new drawing using Main menu task 1, and
issue the IGESIN command before drawing anything.

Format:     IGESIN  File name: (name)

See also:   appendix C of the AutoCAD Reference Manual.
\IGESOUT
The  IGESOUT  command creates an IGES ASCII format file from the
current drawing.

Format:     IGESOUT  File name: (name)

See also:   appendix C of the AutoCAD Reference Manual.
\INSBASE
INSBASE
Insertion base point (set by BASE command) expressed in UCS.
\INSERT
The  INSERT  command inserts one occurrence of a defined Block into the
current drawing at a designated point, applying scale factors and
rotation.  If the named Block is not defined in the current drawing, but
another drawing exists with that name, a Block Definition is first
created from the other drawing.

Format:     INSERT  Block name (or ?) <default>:
            Insertion point:
            X scale factor <1> / Corner / XYZ:
            Y scale factor (default = X):
            Rotation angle <0>:

The X/Y scales can be specified simultaneously by using the insertion point
as the lower-left corner of a box, and a new point as the upper-right corner;
just enter the new point in response to the "X scale factor" prompt.

You can enter "drag" to dynamically specify the insertion point, X/Y scales,
and rotation angle.  You can preset the scale and rotation for the dragged
image by using the Scale or Rotate option at the "Insertion point:" prompt.

\
Normally, the Block is inserted as a single entity.  However, if you precede
the Block name with a "*", its individual components are inserted.  In this
case, only one scale factor is requested.

Entering "xyz" after the "X scale factor" prompt tells AutoCAD that you
want to specify all three scale factors, X, Y, and Z.

Format:     INSERT  Block name (or ?) <default>:
            Insertion point:
            X scale factor <1> / Corner / XYZ:  XYZ
            X scale factor <1> / Corner:
            Y scale factor (default = X):
            Z scale factor (default = X):
            Rotation angle <0>:

If the Block has Attributes, prompts for the Attribute values will appear
next.  If system variable ATTDIA is set nonzero and the display driver
has the needed features, a dialogue box will serve this purpose instead.

\
When dragging a Block into position, the default scale of 1 and default
rotation of 0 degrees are used for the drag image.  If you know the
scale or rotation beforehand, you can enter one of the following
options when the "Insertion point:" prompt is issued, to "preset" the
scale or rotation for the drag image.

    Scale   - Presets (uniform) scale factor
    XScale  - Presets X scale factor
    YScale  - Presets Y scale factor
    ZScale  - Presets Z scale factor
    Rotate  - Presets rotation amount

If you've specified one of these options, the corresponding prompt that
normally follows entry of the insertion point will be skipped.
(Variations of these options, with a leading "p", can be used to affect
only the drag image, issuing the scale and rotation prompts as usual
after the insertion point has been established.)

See also:   "Insert Command -- Block Reference" in chapter 9 of the AutoCAD 
            Reference Manual.

\ISOPLANE
The  ISOPLANE  command permits selection of the current drawing plane
(top, left, or right) when the isometric Snap style is in effect.

Format:     ISOPLANE  Left/Top/Right/(Toggle):

   Left    - Plane defined by 150 and 90 degree axis pair
   Top     - Plane defined by 30 and 150 degree axis pair
   Right   - Plane defined by 30 and 90 degree axis pair
   RETURN  - Toggles to the next plane in a circular fashion

See also:   "Isoplane Command" in chapter 8 of the AutoCAD Reference Manual.
\KEYS
\TOGGLES
KEYS
TOGGLES

The following control keys are used to toggle various modes on and off.

   CTRL B  - Snap mode on/off.
   CTRL D  - Coordinate display control.  Static, dynamic with
             length<angle, dynamic with coordinates only.
   CTRL E  - Circular toggle of ISO plane.
   CTRL G  - Grid on/off.
   CTRL O  - Ortho mode on/off.
   CTRL Q  - Printer echo on/off.
   CTRL T  - Tablet mode on/off.

See also:   chapter 8 of the AutoCAD Reference Manual.
            chapter 2 of the Installation Guide.
\LASTANGLE
LASTANGLE
The end angle of the last arc entered, relative to the XY plane of
the current UCS for the current space (read-only).
\LASTPOINT
LASTPOINT
The last point entered, expressed in UCS coordinates for the current space.
Referenced by "@" during keyboard entry.
\LASTPT3D
LASTPT3D
Same as LASTPOINT.  This variable will be discontinued in a future release.
\LAYER
The  LAYER  command allows you to control which drawing layer you are
currently drawing on, and which drawing layers are to be displayed.  It
also controls the color and linetype associated with each drawing layer.

Format:     LAYER  ?/Make/Set/New/ON/OFF/Color/Ltype/Freeze/Thaw:

   ? wildname          -  Lists layers, with states, colors and linetypes
   Make name           -  Creates a new layer and makes it current
   Set name            -  Sets current layer
   New name,name       -  Creates new layers
   ON wildname         -  Turns on specified layers
   OFF wildname        -  Turns off specified layers
   Color c wildname    -  Assigns color "c" to specified layers
   Ltype x wildname    -  Assigns linetype "x" to specified layers
   Freeze wildname     -  Completely ignores layers during regeneration
   Thaw wildname       -  "Unfreezes" specified layers
   Ltype ?             -  Lists loaded linetypes

Where "wildname" appears above, the layer name(s) can include "*" and "?"
wild cards.  A single "*" selects all existing layers.

See also:   "Layer Command" in chapter 7 of the AutoCAD Reference Manual.
\LENSLENGTH
LENSLENGTH
Length of the lens (in millimeters) used in perspective viewing,
for the current viewport (read-only).
\LIMCHECK
LIMCHECK
Limits checking for the current space. On if 1, off if 0.
\LIMITS
The  LIMITS  command allows you to change the upper and lower limits
of the drawing area while working on a drawing, and to turn limits
checking on or off.

Format:     LIMITS
            ON/OFF/<Lower left corner> <current>:
            Upper-right corner <current>:

See also:   "Limits Command" in chapter 3 of the AutoCAD Reference Manual.
\LIMMAX
LIMMAX
Upper-right drawing limits for the current space, expressed in
World coordinates.
\LIMMIN
LIMMIN
Lower-left drawing limits for the current space, expressed in
World coordinates.
\LINE
The  LINE  command allows you to draw straight lines.  You can specify the
desired endpoints using either 2D or 3D coordinates, or a combination.  If
you enter 2D coordinates, AutoCAD uses the current elevation as the Z
component of the point.

Format:     LINE  From point:  (point)
            To point:  (point)
            To point:  (point)
            To point:  ...RETURN to end line sequence

To erase the latest line segment without exiting the LINE command,
enter "u" when prompted for a "To" point.

You can continue the previous line or arc by responding to the
"From point:" prompt with a space or RETURN.  If you are drawing
a sequence of lines that will become a closed polygon, you can
reply to the "To point" prompt with "c" to draw the last segment
(close the polygon).

Lines can be constrained to horizontal or vertical by the ORTHO command.

See also:   "Line Command" in chapter 4 of the AutoCAD Reference Manual.
\LINE,From
The  LINE  command is asking you to pick a point (or enter a coordinate) for
the starting point of the line.

You can continue the previous line or arc by responding to this prompt
with a space or RETURN.
\LINE,To
The  LINE  command is asking you to pick a point (or enter a coordinate) to
to complete the line segment.

If you have drawn more than one segment, you can reply to the "To point"
prompt with "c" to draw the last segment (close the polygon).

To erase the latest line segment without exiting the LINE command,
enter "u" at this prompt.

Relative, cylindrical, and spherical coordinate point entry is allowed.
Also, object snap can be used to specify particular points (endpoints of
lines, centers of circles, etc.) of previously drawn entities.
\LINETYPE
You can control the dot-dash linetype of each entity individually,
or by layer.  To change the linetype of existing objects, use the
CHANGE  command.  To control layer linetypes, use the  LAYER  command.

The  LINETYPE  command sets the linetype for new entities.  It
can also load linetype definitions from a library file, write new
definitions to a library file, and list the linetype definitions in a
library file.

Format:     LINETYPE  ?/Create/Load/Set:

   ?      - Lists the linetypes defined in a specified library file
   Create - Allows creation of a new linetype and stores it in a specified
            library file
   Load   - Loads selected linetypes from a specified library file
   Set    - Sets the current linetype used for newly drawn entities

Note:  The Set option and the LAYER Ltype command automatically load
linetypes from the standard linetype library file.  The Load option
is needed only if you are storing linetypes in a different library file.

See also:    "Linetype Command" in chapter 7 of the AutoCAD Reference Manual.
\LINETYPE,New entity linetype
The LINETYPE command's Set option establishes the current linetype
for new entities.

Format:     LINETYPE   ?/Create/Load/Set:  S
            New entity linetype (or ?) <current>:

You can reply with a linetype name (not necessarily loaded yet), in which
case all new objects you draw will be given this linetype, regardless of
which layer is current, until you again use LINETYPE Set.

If you respond with "BYLAYER", new objects you draw will inherit the
linetype assigned to the layer upon which they are drawn.

If you respond with "BYBLOCK", new objects will be drawn with the CONTINUOUS
linetype until they are grouped into a Block.  Then, whenever that Block is
inserted, the objects will inherit the linetype of the Block insertion.

Finally, if you respond with "?", the currently loaded linetypes will
be listed.
\LINETYPE,Name of linetype
The LINETYPE command's Create option allows the definition of a new
linetype pattern.  The new linetype is not associated with a particular
drawing, but is stored in a library file and can be loaded with the Load
option.

Format:     LINETYPE   ?/Create/Load/Set:  C
            Name of linetype to create:
            File for storage of linetype <default>:

Respond with the name of the new linetype and the name of the library file
that you plan to store it in. If the linetype name is found to already exist
in the specified file, AutoCAD shows the current definition and asks if you
want to redefine it.

You are then asked to enter descriptive text and the pattern definition
itself. For more information on defining linetype patterns, see appendix B of
the AutoCAD Reference Manual.
\LINETYPE,Linetype(s) to load
The LINETYPE command's Load option allows you to specify a set of linetypes
to be loaded into the current drawing for subsequent use.

Format:     LINETYPE   ?/Create/Load/Set:  L
            Linetype(s) to load:
            File to search <default>:

Multiple names can be entered separated by commas, and wild-card characters
are allowed.  There is no default; use "*" to specify all.  If any of the
linetype names specified are found in the file and that name is used by a
linetype that is already loaded, AutoCAD will prompt you to decide if the
definition should be reloaded.
\LIST
The  LIST  command displays database information about selected
objects.

Format:     LIST  Select objects:  (select)

If the listing is lengthy, you can use CTRL S to pause momentarily,
or CTRL C to abort the listing.  To echo the listing to your printer,
use CTRL Q.

See also:   "List Command" in chapter 5 of the AutoCAD Reference Manual.
\LOAD
The  LOAD  command is used to load Shape definitions from a library file.

Format:     LOAD  Name of shape file to load (or ?):  (Shape filename)

No file type should be specified; type ".shx" is assumed.

If you respond to the LOAD command's prompt with "?", AutoCAD will
display a list of the currently loaded Shape files.

See also:   "Load Command" in chapter 4 of the AutoCAD Reference Manual.
\LTSCALE
The  LTSCALE  command governs the global scale factor for linetype dash
lengths.

Format:     LTSCALE  New scale factor <current>:

See also:   "Ltscale Command" in chapter 7 of the AutoCAD Reference Manual.

This is also a system variable and can be changed using the SETVAR command.
\LTYPE
There is no  LTYPE  command; see  LAYER  and  LINETYPE.

See also:   "Layer Ltype -- Set Layer Linetype" in chapter 7 of the AutoCAD 
            Reference Manual.
\LUNITS
LUNITS
Linear units mode (1 = scientific, 2 = decimal, 3 = engineering, 
4 = architectural, 5 = fractional).
\LUPREC
LUPREC
Linear units decimal places or denominator.
\MAXACTVP
MAXACTVP
Maximum number of viewports to regenerate at one time.
\MAXSORT
MAXSORT
Maximum number of symbol/file names to be sorted by listing commands. 
If the total number of items exceeds this number, then none of the items
are sorted.
\MEASURE
The  MEASURE  command allows you to measure an entity, placing
markers along the object at intervals of the specified distance.

Format:     MEASURE  Select object to measure:  (select one)
            <Segment length>/Block:

You are then prompted to specify the segment length between markers, and,
optionally, a Block to use as the marker.

See also:   "Measure Command" in chapter 5 of the AutoCAD Reference Manual
\MEASURE,Select object to measure
The MEASURE command is prompting you to select a single Line, Arc, Circle, 
or Polyline.
\MEASURE,<Segment length>/Block
The MEASURE command is prompting for either a segment length to use between
the markers, or optionally a Block to use as the marker.  If you enter a
segment length, the object is measured into segments of that length, starting
at the endpoint closest to the point by which the entity was selected.  Point
entities will be placed where each pair of segments meet.

You can request a specific Block to be inserted instead of the Point entities
by responding to the second prompt with "b".  AutoCAD will ask:

            Block name to insert:
            Align block with object? <Y>
            Segment length:

The Block must currently be defined within the drawing.  If you answer "y"
to the "Align block?" prompt, the Block will be rotated around its insertion
point so that it is drawn tangent to the object being measured.  After these
prompts are answered, AutoCAD will measure the object, drawing the specified
Block where each pair of segments meet.
\MEASURE,Block name to insert
The MEASURE command is asking for the name of a Block, that is defined in the
current drawing, to use as a marker instead of Points. AutoCAD will then ask:

            Align block with object? <Y>

If you answer "y", the Block will be rotated around its insertion point so
that it is drawn tangent to the object being measured.

AutoCAD then prompts for the segment length to use.  After these prompts are
answered, AutoCAD will measure the object, drawing the specified Block where
each pair of segments meet.
\MEASURE,Align Block
The MEASURE command is asking if the Block specified to be used as a marker
should be aligned with the selected object. If you respond "y", the Block
is rotated around its insertion point so that it is drawn tangent to
the object being measured.
\MEASURE,Segment length
The MEASURE command is asking for the segment length to use when measuring
the selected object and placing the selected marker.
\MENU
The  MENU  command is used to load a new set of commands into the
screen, tablet, and button menus from a disk file.

Format:     MENU
            Menu file name or . for none <current>:

If file dialogue boxes are enabled, one is presented instead of the filename
prompt and a new menu can be selected from there.

At the prompt, if you give a null response, the current menu file is
reloaded.  If you respond with ".", the current menu will be cleared and no
menu file will be loaded.

See also:   "Menu Command" in chapter 3 of the AutoCAD Reference Manual.
\MENUECHO
MENUECHO
Menu echo/prompt control bits (sum of the following):

   1  =  Suppresses echo of menu items (^P in a menu item toggles echoing)
   2  =  Suppresses printing of system prompts during menu
   4  =  Disables ^P toggle of menu item echoing

The default value is 0 (all menu items and system prompts
are displayed).
\MENUNAME
MENUNAME
The name of the currently loaded menu file.  Includes a drive/path
prefix if you entered it (read-only).
\MINSERT
The  MINSERT  command is very similar to the INSERT command in that it is
used to insert a Block.  However, the  MINSERT  command creates multiple
instances of the Block in a rectangular pattern, or array.

During the  MINSERT  command, AutoCAD asks the same questions as for the
INSERT command (insert point, X/Y scaling, rotation angle, etc.).
"MINSERT *" is not permitted, however.  Following the standard INSERT
prompts, the  MINSERT  command will prompt:

    Number of rows (---):
    Number of columns (|||):
    Unit cell or distance between rows (---):  (if row count is
                                                2 or more)

    Distance between columns (|||):  (if column count is 2 or more
                                      and unit cell was not selected)

The Unit cell allows you to designate two opposite corners of a rectangle
to "show" AutoCAD the row and column spacing in one operation.

\

You cannot EXPLODE a MINSERT.  See also INSERT and ARRAY.

See also:   "Minsert Command -- Block Arrays" in chapter 9 of the AutoCAD 
            Reference Manual.

\MIRROR
The  MIRROR  command allows you to mirror selected entities in your
drawing.  The original objects can be deleted (like a MOVE) or retained
(like a COPY).

Format:     MIRROR  Select objects: (select)
            First point of mirror line: (point)
            Second point: (point)
            Delete old objects? <N> (Yes, No, or RETURN)

The mirror line you designate is the axis about which the selected objects
are mirrored; it can be at any angle.

Often, you will want to reflect a section of a drawing but keep all its
annotation readable the usual way.  AutoCAD permits this through the
MIRRTEXT system variable.  When MIRRTEXT is set to 1 (the default value),
text will be reflected normally and will be mirror-inverted.  If you set
MIRRTEXT to zero (using the SETVAR command or AutoLISP), the MIRROR command
will handle text items (and Attribute entities) specially, preventing them
from being reversed or turned upside down in the mirrored image.

See also:   "Mirror Command" in chapter 5 of the AutoCAD Reference Manual.
\MIRRTEXT
MIRRTEXT
Mirror reflects text if nonzero, retains text direction if zero.
\MOVE
The  MOVE  command is used to move one or more existing drawing
entities from one location in the drawing to another.

Format:     MOVE  Select objects:  (select)
            Base point or displacement:
            Second point of displacement:  (if base selected above)

If you designate a base point, the selected object(s) are dynamically dragged
to their new location unless DRAGMODE has been turned off (if this is the
case, enter "drag" at the "Second point ..." prompt).

All forms of point entry are valid at the "Base point or displacement"
prompt.  Entering a distance and angle to the "Base point ..." prompt will
move the selected object(s) relative to the current UCS origin.

See also:   "Move Command" in chapter 5 of the AutoCAD Reference Manual.

\MSLIDE
The  MSLIDE  command "takes a picture" of the current display, and saves
it in a slide file for later viewing with the VSLIDE command.

Format:     MSLIDE  Slide file <current>: (name)

The current drawing name is supplied as a default.

The display is redrawn as the slide is being made.

See also:   "Mslide Command -- Making a Slide" in chapter 11 of the AutoCAD 
            Reference Manual.
\MSPACE
The MSPACE command switches from paper space to model space.  TILEMODE must
be set to 0 (off) before you can use this command (see the section "TILEMODE 
System Variable" in chapter 6).  There must be at least one viewport on and 
active, in order for AutoCAD to switch from paper space to model space.  

Format:     MSPACE

See also:   "Mspace Command -- Switch to Model Space" in chapter 6 of the 
            AutoCAD Reference Manual.
\MULTIPLE
The  MULTIPLE  command instructs AutoCAD to repeat the next command you
enter, until cancelled by a CTRL C.  No prompt is issued when you enter
the MULTIPLE command, so you can think of it as a modifier for the next
command.  For instance:

     Command:  MULTIPLE  CIRCLE

would cause the CIRCLE command to be repeated until you enter CTRL C to
stop it.  Only the command name is repeated (not the options you might
have entered during the command).

See also:  "Multiple Command Modifier" in chapter 3 of the AutoCAD Reference 
           Manual.
\MVIEW
The MVIEW command creates new Viewports, turns their display on or off,
and instructs AutoCAD to perform hidden-line removal on a Viewport's
contents during a paper-space plot.  TILEMODE needs to be set to 0 (off),
in order for the MVIEW command to work.  If you invoke the MVIEW command   
in model space, AutoCAD temporarily switches to paper space for the 
duration of the command and then returns to model space.

Format:     MVIEW
            ON/OFF/Hideplot/Fit/2/3/4/Restore/<First Point>:

  ON/OFF   - Turns Viewports on and off.  When you turn a Viewport
             off, AutoCAD clears its model space view and doesn't
             regenerate it again until you turn the Viewport back on.
             The number of Viewports turned on cannot exceed the 
             maximum allowable number of active Viewports (MAXACTVP).
  Hideplot - Instructs AutoCAD to perform a hidden-line removal on
             the contents of a Viewport when plotting the Viewport
             in paper space.  AutoCAD asks if you want to turn
             automatic hidden-line removal on or off.
  Fit      - Creates a Viewport sized to fill your graphics screen.  
  2/3/4    - Creates two, three, or four Viewports with a single
             operation.  AutoCAD will then ask how these Viewports
             should be created.
\
  Restore  - Use this option to translate Viewport configurations saved 
             with the VPORTS command into individual Viewport entities
             in paper space.

  <First 
   Point>  - Selects two points to specify the corners of a single new 
             Viewport.  When you pick the first point, AutoCAD prompts
             for the opposite corner and displays a box cursor to help
             you visualize the size of the new Viewport.  The new 
             Viewport becomes the current Viewport.

See also:  "Mview Command" in chapter 6 of the AutoCAD Reference Manual.

\OFFSET
The  OFFSET  command constructs an entity parallel to another
entity at either a specified distance or through a specified point.
You can  OFFSET  a Line, Arc, Circle, or Polyline.

Format:     OFFSET Offset distance or Through <last>:
            Select object to offset:  (point to the object)

To offset from a wide Polyline, measure the offset distance from the
centerline of the Polyline.  Once the object is selected, it is
highlighted on the screen.  Depending on whether you specified an
offset distance or selected "through point" in the original prompt, you
will receive one of the following prompts:

            Side to offset:
            Through point:

The offset is then calculated and drawn.  The selected object will be
dehighlighted and the "Select object to offset" prompt is reissued.
RETURN exits the command.

See also:   "Offset Command -- Parallel Lines and Curves" in chapter 5 of the 
            AutoCAD Reference Manual.
\OFFSET,Select
Select a Line, Arc, Circle, or Polyline to Offset.

\OOPS
The OOPS command reinserts the object(s) that were deleted by the most
recent ERASE or BLOCK command.

Format:     OOPS

For a general method of reversing the effect of most commands,
see the UNDO command.

See also:   "Oops Command" in chapter 5 of the AutoCAD Reference Manual.
            "Undo Command" in chapter 5 of the AutoCAD Reference Manual.
\ORTHO
The  ORTHO  command allows you to control "orthogonal" drawing
mode.  All lines and traces drawn while this mode is on are constrained
to be horizontal or vertical.

Formats:    ORTHO ON     - Turns orthogonal mode on
            ORTHO OFF    - Turns orthogonal mode off

Note:  When the Snap grid is rotated, Ortho mode rotates accordingly.
Also, if the isometric Snap style is in effect, Ortho mode is applied
to the axis pair associated with the current Iso plane.

See also:   "Ortho Command" in chapter 8 of the AutoCAD Reference Manual.
\ORTHOMODE
ORTHOMODE
Ortho mode on if 1, off if 0.
\OSMODE
OSMODE
Object snap modes bit-code (sum of the following):

   1 = Endpoint          64 = Insertion
   2 = Midpoint         128 = Perpendicular
   4 = Center           256 = Tangent
   8 = Node             512 = Nearest
  16 = Quadrant        1024 = Quick
  32 = Intersection

\OSNAP
The  OSNAP  command is used to set "running" object snap modes.  Object
(geometric) snap allows you to designate points that are related to objects
already in your drawing.

Format:     OSNAP  Object snap modes:

   CENter        - Center of Arc or Circle
   ENDpoint      - Closest endpoint of Line/Arc or closest corner
                   of Trace/Solid/3D Face
   INSertion     - Insertion point of Text/Block/Shape/Attribute
   INTersection  - Intersection of Lines/Arcs/Circles or corner of
                   Trace/Solid/3D Face
   MIDpoint      - Midpoint of Line/Arc or midpoint of an edge of
                   Trace/Solid/3D Face
   NEArest       - Nearest point on Line/Arc/Circle/Point
   NODe          - Nearest Point entity (or Dimension definition point)
   NONe          - None (off)
   PERpendicular - Perpendicular to Line/Arc/Circle
   QUAdrant      - Quadrant point of Arc or Circle
   QUIck         - Quick mode (first find, not closest)
   TANgent       - Tangent to Arc or Circle

\
Use commas to separate multiple modes.  These modes can also be entered
whenever a point is requested, to override the running object snap modes.

Object snap, in its command form (running modes), or as an override of the
running mode, can be selected from the Screen menu by picking the second line
"* * * *" and selecting a mode, from the Tablet menu, or from the Assist
pull-down menu.

See also:   "Osnap Command" in chapter 8 of the AutoCAD Reference Manual.
\PAN
The  PAN  command allows you to move the display window in any direction,
without changing its magnification.  This lets you see details that are
currently off the screen.

You can specify a relative movement, as in:

Format:     PAN  Displacement:  (relative coordinates)
            Second point:  (RETURN)

Or you can designate two points to specify the displacement you want.

Format:     PAN  Displacement:  (point)
            Second point:  (point)

See also:   "Pan Command" in chapter 6 of the AutoCAD Reference Manual.
\PDMODE
PDMODE
Point entity display mode.
\PDSIZE
PDSIZE
Point entity display size.
\PEDIT
The  PEDIT  command supports numerous ways of editing 2D Polylines,
3D Polylines, and polygon meshes.

Format:   PEDIT  Select Polyline:  (Select)

If you select a 2D Polyline the following prompt is displayed:

   Close/Join/Width/Edit vertex/Fit curve/Spline curve/Decurve/Undo/eXit <X>:

"Close" will be replaced by "Open" if the polyline is currently closed.

These functions are:

   Close, Open    - Opens or closes Polylines
   Join           - Joins pieces into Polylines
   Width          - Changes the width and/or tapers the Polyline or segment 
   Edit vertex    - Breaks Polylines into pieces, moves existing vertices
                    or inserts new ones 
   Fit curve      - Fits curves to the line
   Spline curve   - Fits a spline curve to the Polyline's control points 
   Decurve        - Removes curves and kinks
   Undo           - Undoes the last PEDIT command
   eXit           - Exits out of the PEDIT command

\
The PEDIT command's Edit vertex option causes an "X" to appear at the
Polyline's first vertex and displays the following suboption prompt:

     Next/Previous/Break/Insert/Move/Regen/Straighten/Tangent/Width/eXit <N>:

   Next       - Moves "X" to the next vertex.
   Previous   - Moves "X" to the previous vertex.
   Break      - Remembers the currently marked vertex and lets you move to
                another vertex.  You can then remove the segments between
                these two vertices.
   Insert     - Adds a new vertex after the currently marked vertex.
   Move       - Lets you move the location of the current vertex.
   Regen      - Regenerates the Polyline.  Used with "Width", below.
   Straighten - Remembers the currently marked vertex and lets you move to
                another vertex.  You can then replace the segments between
                these two vertices with one straight segment.
   Tangent    - Lets you attach a tangent direction to the current vertex
                for later use in curve fitting.
   Width      - Changes the starting and ending widths for the segment
                following the marked vertex.
   eXit       - Exits from vertex editing.

\
If you select a 3D Polyline the following prompt is displayed:

     Close/Edit vertex/Spline curve/Decurve/Undo/eXit <X>:

"Close" will be replaced by "Open" if the polyline is currently closed.

The PEDIT command's Edit vertex option causes an "X" to appear at the
Polyline's first vertex and displays the following suboption prompt:

     Next/Previous/Break/Insert/Move/Regen/Straighten/eXit <N>:

All of these functions perform the same function as for the 2D Polylines,
except that they accept general, three dimensional points in all cases.

\
If you select a polygon mesh the following prompt is displayed:

     Edit vertex/Smooth surface/Desmooth/Mclose/Nclose/Undo/eXit <X>:

"Mclose" and "Nclose" will be replaced by "Mopen" and "Nopen" if the polygon
mesh is currently closed.

These functions are:

   Mclose, Nclose - Opens or closes a polygon mesh in the N and/or M 
   Mopen, Nopen     direction

   Smooth surface - Smoothes and desmoothes a polygon mesh
   Desmooth

   Edit vertex    - Moves existing vertices

\
The PEDIT command's Edit vertex option causes an "X" to appear at the
first vertex of the mesh and displays the following suboption prompt:

     Vertex (m,n): Next/Previous/Left/Right/Up/Down/Move/REgen/eXit <N>:

   Next     - Moves the "X" to the next vertex.
   Previous - Moves the "X" to the previous vertex.
   Left     - Moves the "X" forward to the next vertex in the N direction.
   Right    - Moves the "X" backward to the next vertex in the N direction.
   Up       - Moves the "X" up to the next vertex in the M direction.
   Down     - Moves the "X" down to the next vertex in the M direction.
   Move     - Repositions the marked vertex.
   REgen    - Redisplays the polygon mesh.
   eXit     - Exits to the general mesh editing command.

See also:   "Pedit Command -- Polyline/Mesh Editing" in chapter 5 of the 
AutoCAD Reference Manual. 
\PEDIT,Close/Join/Width/Edit vertex/Fit curve/Spline curve/Decurve/Undo/eXit <X>:
\PEDIT,Open/Join/Width/Edit vertex/Fit curve/Spline curve/Decurve/Undo/eXit <X>:
The  PEDIT  command is editing a selected 2D Polyline.

The options are:

   Close/Open   - Opens or closes the Polyline.
   Join         - Joins polylines, line segments, or arcs into one Polyline.
   Width        - Changes the width of the Polyline.
   Edit Vertex  - Moves existing vertices or inserts new ones.
   Fit curve    - Fits a curve to the selected Polyline.
   Spline curve - Fits a spline curve to the selected Polyline's control points.
   Decurve      - Removes curve fit information from the selected Polyline.
   Undo         - Undoes the most recent operation.
   eXit         - Returns to the Command: prompt.

See also:   chapter 5 of the AutoCAD Reference Manual.
\PEDIT,Next/Previous/Break/Insert/Move/Regen/Straighten/Tangent/Width/eXit <N>:
The  PEDIT  command is editing individual vertices of a selected 2D Polyline.
A marker is placed on the current vertex.

The options are:

   Next         - Proceeds to the next vertex.
   Previous     - Moves back to the previous vertex.
   Break        - Selects the current vertex as the first point of a break.
   Insert       - Inserts a new vertex at the specified location.
   Move         - Moves the current vertex to a new specified location.
   Regen        - Regenerates the selected Polyline, showing changes.
   Straighten   - Removes all vertices between two selected vertices.
   Tangent      - Specifies a new tangent direction for an arc segment.
   Width        - Specifies the width of the Polyline at the current vertex.
   eXit         - Returns to the main PEDIT prompt.

See also:   chapter 5 of the AutoCAD Reference Manual.
\PEDIT,Close/Edit vertex/Spline curve/Decurve/Undo/eXit <X>:
\PEDIT,Open/Edit vertex/Spline curve/Decurve/Undo/eXit <X>:
The  PEDIT  command is editing a selected 3D Polyline.

The options are:

   Close/Open   - Opens or closes the Polyline.
   Edit Vertex  - Moves existing vertices or inserts new ones.
   Spline curve - Fits a spline curve to the selected Polyline's control points.
   Decurve      - Removes curve fit information from the selected Polyline.
   Undo         - Undoes the most recent operation.
   eXit         - Returns to the Command: prompt.

See also:   chapter 5 of the AutoCAD Reference Manual.
\PEDIT,Next/Previous/Break/Insert/Move/Regen/Straighten/eXit <N>:
The  PEDIT  command is editing individual vertices of a selected 3D Polyline.
A marker is placed on the current vertex.

The options are:

   Next         - Proceeds to the next vertex.
   Previous     - Moves back to the previous vertex.
   Break        - Selects the current vertex as the first point of a break.
   Insert       - Inserts a new vertex at the specified location.
   Move         - Moves the current vertex to a new specified location.
   Regen        - Regenerates the selected Polyline, showing changes.
   Straighten   - Removes all vertices between two selected vertices.
   eXit         - Returns to the main PEDIT prompt.

See also:   chapter 5 of the AutoCAD Reference Manual.
\PEDIT,Edit vertex/Smooth surface/Desmooth
The PEDIT command is editing a selected polygon mesh.  A marker is placed at
the current vertex.

The options are:

   Edit vertex    - Moves existing vertices.
   Smooth surface - Surface fits to the polygon mesh.
   Desmooth       - Removes surface fit vertex information.
   Mclose/Nclose  - Closes the polygon mesh in the M/N direction.
   Mopen/Nopen    - Opens the polygon mesh in the M/N direction.
   Undo           - Undoes the most recent operation.
   eXit           - Returns to the main PEDIT prompt.

See also:   chapter 5 of the AutoCAD Reference Manual.
\PEDIT,Vertex (m,n): Next/Previous/Left/Right/Up/Down/Move/REgen/eXit <N>:
The  PEDIT  command is editing the individual vertices of a polygon mesh.
A marker is placed at the current vertex.

The options allow you to move the marker to a selected vertex, specify a new
location for that vertex (with the Move option), and regenerate the mesh
showing the latest changes.

See also:   chapter 5 of the AutoCAD Reference Manual.
\PEDIT,Enter new width for all segments
The  PEDIT  command allows you to change the width of all segments to a
uniform width. A real number can be entered, or two points can be picked from
the screen.
\PEDIT,Next/Previous/Go/Exit
The  PEDIT  command's Edit vertex option is expecting a vertex to be selected
as the stopping point for a Break or Straighten operation.
\PEDIT,Enter location
The PEDIT command's Edit vertex option is expecting a location to place the
new vertex.  Any form of point specification is allowed; the Z component is
ignored for 2D Polylines.
\PEDIT,Enter new location
The  PEDIT  command's Edit vertex option is expecting a new location for the
current vertex.  Any form of point specification is allowed; the Z component
is ignored for 2D Polylines.
\PEDIT,Direction of tangent
The  PEDIT  command's Edit vertex option is expecting a new tangent direction
from the current vertex for curve fitting.
\PEDIT,Enter starting width
The  PEDIT  command is asking for a width to apply to the first, or current,
vertex.  You can enter a real number or pick two points.
\PEDIT,Enter ending width
The  PEDIT  command is asking for a width to apply to the next vertex.  You
can enter a real number or pick two points.
\PERIMETER
PERIMETER
Perimeter computed by AREA, LIST, or DBLIST (read-only).
\PICKBOX
PICKBOX
Object selection target height, in pixels.
\PFACE
The PFACE command produces a general, polygon mesh of arbitrary topology.
Whereas other kinds of meshes represent single, coherent objects, such as        
surface patches, a Pface mesh represents what might appear to be numerous     
unrelated elements.  For example, a Pface mesh can represent a solid created    
by Boolean operations, consisting of pieces belonging to many different
primitives, each with a different layer or color.

Format:     PFACE
            Vertex 1:
            Vertex 2: (enter RETURN)
            Face 1, vertex 1:
            Face 1, vertex 2:
            Face 2, vertex 1:
            Face 2, vertex 2:

\
You  enter all the vertices used in the mesh.  There is no limit to the 
number of vertices you can enter.  You can specify them as 2D or 3D points,
and place them at any distance from one another.  After entering the last
vertex, enter a blank line (a null response such as RETURN).  AutoCAD prompts
for the vertices that make up the faces.  You define each face by entering 
vertex numbers for all the vertices of that face.  After entering the last 
vertex, enter a blank line.  AutoCAD prompts for the next face.  To finish 
defining the faces, enter another blank line.  AutoCAD draws the mesh.
\PICKBOX
PICKBOX
Object selection target height, in pixels.
\PLAN
The  PLAN  command puts the display in Plan view (VPOINT 0,0,1) with respect
to either the current UCS, a previously saved coordinate system, or the
World Coordinate System.

Format:     PLAN
            <Current UCS>/UCS/World:

The various options are described next.

   Current UCS - A null response sets the display to plan view with respect
                 to the current User Coordinate System 
   UCS         - Sets the display to plan view with respect to a previously
                 saved coordinate system 
   World       - Sets the display to plan view with respect to the World
                 Coordinate System 

See also:   "Plan Command -- Set Plan View of Specified UCS" in chapter 6 of 
            the AutoCAD Reference Manual.
\PLINE
The  PLINE  command draws Polylines.  A Polyline is a connected sequence of
line and arc segments treated as a single entity.

Format:     PLINE  From point:  (select)
            Current line-width is nnn

Line mode:  Arc/Close/Halfwidth/Length/Undo/Width/<Endpoint of line>:

Arc mode:   Angle/CEnter/CLose/Direction/Halfwidth/Line/Radius/
            Second pt/Undo/Width/<Endpoint of arc>:

To alter an existing Polyline, use the  PEDIT  command.

See also:   "Pline Command -- 2D Polylines" in chapter 4 of the AutoCAD 
            Reference Manual.
\PLINE,Starting half-width
The  PLINE  command is requesting a real number or two point picks to use as
the default distance between the Polyline's center line and its outside edge
at the current vertex.  As the option indicates, this is one-half of the
total Polyline width.  This distance becomes the default for the Ending
half-width, which you will be prompted for next.  Changing the Ending
half-width causes the Polyline to taper between the vertices.
\PLINE,Ending half-width
The  PLINE  command is requesting a real number or two point picks to use as
the Ending half-width.  The default is the Starting half-width.  Using an
Ending half-width that is different causes the Polyline to taper between the
vertices.

\PLOT
The  PLOT  command sends your drawing to your plotter or to a specified file.
Chapter 13 of the AutoCAD Reference Manual fully documents plotting and the
PLOT and PRPLOT commands.  Plotting can also be initiated from the Main menu.

Format:     PLOT
            What to plot -- Display, Extents, Limits, View, or Window <D>:

In order to plot to a file, you must first configure the target plotter,
just as if you were going to send plot output directly to the plotter.
During this configuration, you will be asked if you want to write the
plot to a file and the plot filename.

See also:   Chapter 13 of the AutoCAD Reference Manual.
\POINT
The  POINT  command permits you to place a Point entity in the drawing.
Points are useful as "nodes" for object snap purposes.

Format:     POINT  Point:  (designate point)

The appearance of Points in your drawing is governed by the PDMODE
system variable.  A "slide" file is provided to illustrate the
various forms a point can take.  To view it, enter "VSLIDE acad(points)".

See also:   "Point Command" in chapter 4 of the AutoCAD Reference Manual.

For help on formats for entering points, use "Help Points".
\POINTS
\3D
You can enter points, or coordinates, in any of the following ways:

   Absolute:     x,y
   Relative:     @deltax,deltay
   Polar:        @dist<angle

Normally, distances, points, and angles are entered as decimal numbers,
or in scientific notation.  However, you can also use the UNITS command
to specify linear values in terms of feet and inches, or angles in terms
of degrees/minutes/seconds, grads, radians, or surveyor's units.  For the
commands that accept 3D points, you can include a Z coordinate in the
absolute and relative formats:

   Absolute:     x,y,z
   Relative:     @deltax,deltay,deltaz
   Spherical:    @dist<ang1<ang2
   Cylindrical:  @dist<ang,z

If you omit the Z coordinate, the current elevation is used.

\
Polar, spherical and cylindrical coordinates can now be entered
with or without a leading "@".  The leading "@" is the relative
format while absence of the "@" indicates absolute format.

A leading "*" (or "*" following "@") denotes a World point.

X/Y/Z filters can be used to compose a full point from the X, Y, and
Z components of intermediate points.  For instance, the filter ".X"
will instruct AutoCAD to use just the X coordinate of the following
point.  The Y (and possibly Z) values will then be requested.


See also:   "Entity Selection" in chapter 2 of the AutoCAD Reference Manual.
            "Units Command -- Format Control" in chapter 3 of the AutoCAD
            Reference Manual.
\POLYGON
The  POLYGON  command allows you to draw regular polygons with anywhere
from 3 to 1024 sides.  The size of the polygon can be specified by the
radius of a circle in which it is inscribed or about which it is
circumscribed, or by the length of an edge.

Format:     POLYGON  Number of sides:
            Edge/<Center of polygon>:  (enter a point)
            Inscribed in circle/Circumscribed about circle (I/C):
            Radius of circle:

If you reply with "i", you should then enter the radius of a circle on which 
all the vertices of the polygon will lie.  You can enter the radius 
numerically, or pick a point relative to the center of the polygon.  If you 
pick a point, a vertex of the polygon will be drawn at that point.

If you reply with "c", you should then enter the radius of a circle on which 
the midpoint of each edge of the polygon will lie.  You can enter a number 
or pick a point relative to the center of the polygon.  If you pick a point, 
an edge midpoint will be drawn at that point.

\
For both the Inscribed and Circumscribed options, you can "drag" the
circle radius.  If you specify the radius numerically, the bottom
edge of the polygon will be drawn at the current Snap rotation angle.

If you reply with "edge", you can specify the polygon by designating
the endpoints of one of its edges.  AutoCAD will then prompt:

            First endpoint of edge:
            Second endpoint of edge:

See also:   "Polygon Command" in chapter 4 of the AutoCAD Reference Manual.
\POLYGON,Number of sides
The  POLYGON  command is requesting an integer value (a whole number) to use
as the number of sides for the polygon being created.
\POPUPS
POPUPS
1 if the currently configured display driver supports dialogue boxes,
the menu bar, pull-down menus, and icon menus.  0 if these advanced user
interface features are not available (read-only).
\PRPLOT
The  PRPLOT  command causes a hard copy of the drawing to be produced on a
printer/plotter -- a printer with graphics capability.  It also has the
option to send the print plot to a file for later printer plotting.
Chapter 13 of the AutoCAD Reference Manual fully documents plotting and the 
PLOT and PRPLOT commands.  Printer plotting can also be initiated from the 
Main menu.

Format:     PRPLOT
            What to plot -- Display, Extents, Limits, View, or Window <D>:

In order to printer plot to a file, you must first configure the target
printer/plotter just as if you were going to send printer-plot output
directly to the printer plotter.  During this configuration, you will be
asked if you want to write the plot to a file and the plot filename.

See also:   Chapter 13 of the AutoCAD Reference Manual.
\PSPACE
The PSPACE command switches from model space to paper space.  TILEMODE must
be set to 0 (off) before you can use this command (see the section 
"The TILEMODE System Variable" in chapter 6).  

Format:     PSPACE

See also:   "Pspace Command -- Switch to Paper Space" in chapter 6 of the 
            AutoCAD Reference Manual.
\PURGE
During the course of editing a drawing, you can define Blocks, dimension
styles, layers, linetypes, Shape files, and Text styles that subsequently are
left unused.  The PURGE command allows you to discard these unused objects.

Format:     PURGE
            Purge unused Blocks/Dimstyles/LAyers/LTypes/SHapes/STyles/All:

Reply with the object type you want to purge.  PURGE responds with the name
of each such object that is unused, and asks whether you want to purge it.

PURGE can be used at any time after starting to edit an existing
drawing, until you have issued a command which modifies the drawing database.

See also:   "Purge Command" in chapter 3 of the AutoCAD Reference Manual.
\PURGE,Purge
The  PURGE  command is asking for confirmation before discarding the
unused object.
\QTEXT
The  QTEXT  command governs "quick text" mode.  If QTEXT mode is off
(the normal case), text items are fully drawn.  If QTEXT mode is on,
only a rectangle is drawn enclosing the area of each text item.

Format:     QTEXT  ON/OFF <current>:

See also:   "Qtext Command" in chapter 6 of the AutoCAD Reference Manual.
\QTEXTMODE
QTEXTMODE
Quick text mode on if 1, off if 0.
\QUIT
The  QUIT  command exits from the drawing editor, discarding all updates
to the current drawing, and returns you to the Main menu.  If you then
wish to exit entirely, select item 0 from the Main menu.

Format:     QUIT  Really want to discard all changes to drawing?

If you reply with anything other than "y" or "yes", the QUIT command
is ignored, and you can continue editing.

See also:   "Quit Command" in chapter 3 of the AutoCAD Reference Manual.
\RATVMAX
RATVMAX
Maximum number of vertices per face (read-only).
\REDEFINE
\UNDEFINE
The  UNDEFINE  and  REDEFINE  commands let you override the AutoCAD
built-in commands with versions implemented in AutoLISP or via
external programs listed in the ACAD.PGP file.  For instance, to
undefine the AutoCAD QUIT command, you would enter:

       Command:  UNDEFINE  Command name:  QUIT

and to redefine it, you would enter:

       Command:  REDEFINE  Command name:  QUIT

Even if a command is undefined, you can still use it if you precede the
command name with a period, as in ".QUIT".

See also:   appendix B of the AutoCAD Reference Manual.
\REDO
If  REDO  is entered immediately after a command that undoes something
(U, UNDO Back, or UNDO nnn), it will undo the UNDO.  An UNDO after the
REDO will redo the original UNDO.

See also:   "Redo Command" in chapter 5 of the AutoCAD Reference Manual.
\REDRAW

The  REDRAW  command causes the current viewport to be redrawn, eliminating
any point entry "blips" from the display and causing the current viewport to
appear opaque over any viewports behind it.  Setting BLIPMODE (q.v.) to off
can suppress the drawing of "blips."

Format:     REDRAW

The  REDRAWALL  command can be used to redraw all active viewports.  Both
commands can be used transparently as 'REDRAW and 'REDRAWALL.

See also:   "Redraw Command" in chapter 6 of the AutoCAD Reference Manual.
\REDRAWALL
The  REDRAWALL  command performs a REDRAW in all viewports, eliminating
all point entry "blips" from each viewport.  Note: Setting BLIPMODE to
off suppresses the drawing of "blips."

Format:     REDRAWALL

The  REDRAW  command can be used to redraw the current viewport only, causing
it to appear opaque over any viewports behind it.  Both commands can be used
transparently as 'REDRAW and 'REDRAWALL.

See also:   "Redrawall and Regenall Commands" in chapter 6 of the AutoCAD 
            Reference Manual.
\REGEN
The  REGEN  command regenerates the entire drawing and redraws it on the
screen.

Format:     REGEN

See also:   "Regen Command" in chapter 6 of the AutoCAD Reference Manual.
\REGENALL
The  REGENALL  command performs a REGEN in all viewports, regenerating and
redrawing the drawing in each viewport.

Format:     REGENALL

See also:   "Redrawall and Regenall Commands" in chapter 6 of the AutoCAD 
            Reference Manual.
\REGENAUTO
Some commands can change many entities at once.  The drawing must be
regenerated to reflect such a change, so some commands perform this
regeneration automatically.  The  REGENAUTO  command lets you control
whether such automatic regens are performed.

Format:     REGENAUTO  ON/OFF <current>:

If REGENAUTO is off and a ZOOM or PAN needs to regenerate the drawing,
AutoCAD displays this prompt:

      About to regen, proceed? <Y>

A "no" response aborts the PAN or ZOOM.

This message does not appear if input is coming from a menu item or a script.

See also:   "Regenauto Command" in chapter 6 of the AutoCAD Reference Manual.
\REGENMODE
REGENMODE
Regenauto on if 1, off if 0.
\RENAME
The  RENAME  command lets you change the names of Blocks, layers, linetypes,
text styles, named views, User Coordinate Systems, and viewport configurations
in your drawing.

Format:     RENAME  Block/Dimstyle/LAyer/LType/Style/Ucs/VIew/VPort:
            Old (object) name:  (old name)
            New (object) name:  (new name)

See also:   "Rename Command" in chapter 3 of the AutoCAD Reference Manual.
\RESUME
The  RESUME  command can be used to return to a command script
that has been interrupted due to an error or keyboard input.

Format:     RESUME

See also:   "Resume Command" in chapter 11 of the AutoCAD Reference Manual.
\REVSURF
The  REVSURF  command creates a surface of revolution by rotating a curve
path around a selected rotation axis.

Format:     REVSURF
            Select path curve:  (Select an entity)
            Select axis of rotation:  (Select an entity)
            Start angle <0>:  (Enter an angle value)
            Included angle (+=ccw, -=cw) <Full circle>: (Enter an angle value)

The path curve can be a Line, Arc, Circle, 2D or 3D Polyline.  It will
be rotated around the selected axis to define the surface.  The path
curve defines the N direction of the mesh while the axis of revolution
determines the M direction of the mesh.  The start angle specification
allows you to start drawing the surface of revolution at an offset from
the generating path; its default is 0.  The included angle specifies the
extent of the surface of revolution.

\
The system variable SURFTAB1 controls the number of tabulation lines
generated in the M direction, while SURFTAB2 controls the number of
tabulations generated in the N direction.

See also:   "Revsurf Command -- Surfaces of Revolution" in chapter 4 of the
            AutoCAD Reference Manual.

\ROTATE
The  ROTATE  command can be used to rotate existing entities.

Format:     ROTATE  Select objects:  (Do so)
            Base point:  (point)
            <Rotation angle>/Reference:

If you respond to the last prompt with a numeric angle, this is taken as
a relative angle (number of degrees) by which the selected objects will be
rotated from their current orientation, around the specified base point.
A positive angle causes counterclockwise rotation, and a negative angle
produces clockwise rotation.

If you respond to the last prompt with "r", you can specify the current 
rotation and the new rotation you want.  AutoCAD prompts:

            Rotation angle <0>:
            New angle:

\
You can even "show" AutoCAD the reference angle (by pointing to the two
endpoints of a line to be rotated), and then specify the new angle.  You
can specify the new angle by pointing or by dragging the object.

See also:   "Rotate Command" in chapter 5 of the AutoCAD Reference Manual.

\RSCRIPT
If a script file has been invoked using the SCRIPT command from the
drawing editor, an RSCRIPT command encountered in the script file causes
the script to be restarted from the beginning.

Format:     RSCRIPT

See also:   "Rscript Command -- Continuous Scripts" in chapter 11 of the 
            AutoCAD Reference Manual.
\RULESURF
The  RULESURF  command creates a polygon mesh representing the ruled
surface between two curves.

Format:     RULESURF
            Select first defining curve:  (Pick an entity)
            Select second defining curve:  (Pick an entity)

The curves can be Lines, Points, Arcs, Circles, 2D Polylines, or 3D
Polylines.  If one boundary is closed, then the other must also be
closed.  You can use a Point as the other boundary for either an open
or a closed curve, but both boundary curves cannot be Points.

The ruled surface is constructed as a 2 x X polygon mesh, where X is
the number of tabulations to be generated in the M direction (specified
by the system variable SURFTAB1), while 2 tabulations are generated in
the N direction.

See also:   "Rulesurf Command -- Ruled Surfaces" in chapter 4 of the AutoCAD 
            Reference Manual.

\SAVE
The  SAVE  command allows you to update your drawing on disk periodically
without exiting the drawing editor.

Format:     SAVE  File name:  (name or RETURN)

The current drawing file is the default output file, but you can specify
another filename explicitly.  Do not include a file type; ".dwg" is assumed.

See also:   "Save Command -- Updating Without Exit" in chapter 3 of the 
            AutoCAD Reference Manual.

\SCALE
The  SCALE  command lets you change the size of existing entities.
The same scale factor is applied to X and Y dimensions.

Format:      SCALE  Select objects:  (Do so)
             Base point:  (point)
             <Scale factor>/Reference:

If you respond to the last prompt with a number, this is taken as a
relative scale factor by which all dimensions of the selected objects
will be multiplied.  To enlarge an object, enter a scale factor greater
than 1.  To shrink an object, use a scale factor between 0 and 1.

If you respond to the last prompt with "r", you can specify the current length
and the new length you want.  AutoCAD prompts:

             Reference length <1>:
             New length:

You can "show" AutoCAD the reference length (by pointing to the two endpoints
of a line to be scaled), and then specify the new length.  You can specify
the new length by pointing, or by dragging the object.

See also:   "Scale Command" in chapter 5 of the AutoCAD Reference Manual.
\SCREENSIZE
SCREENSIZE
Current viewport size in pixels, X and Y (read-only).
\SCRIPT
The  SCRIPT  command causes commands to be read from the specified
script file.

Format:     SCRIPT  Script file <default>: (name)

Commands are read from the script file until the end of the file
is reached, a character (preferably BACKSPACE) is entered from the
keyboard, or a command error occurs.  If the script is terminated
early due to a command error or by keyboard entry, it can be resumed
using the  RESUME  command.

The  RSCRIPT  command can be inserted in the script file to restart the
script from the beginning.

See also:   "Script Command" in chapter 11 of the AutoCAD Reference Manual.
\SELECT
The  SELECT  command lets you designate a group of objects
as the current selection-set.  This group can be referenced
as the Previous selection-set in subsequent commands.

Format:     SELECT  Select objects: (do so)

See also:   "Entity Selection" in chapter 5 of the AutoCAD Reference Manual.
\EDIT
\INQUIRY
EDIT
INQUIRY
Most of the AutoCAD edit and inquiry commands issue a "Select objects: "
prompt.  You can point to objects on the screen to form a "selection-set"
of objects upon which the command should operate.  The following options
are available:

   (point)  =  One object
   Multiple =  Multiple objects selected by pointing
   Last     =  Last object
   Previous =  All objects in the Previous selection-set
   Window   =  Objects within Window
   Crossing =  Objects within or Crossing window
   BOX      =  Automatic Crossing (to the left) or Window (to the right)
   AUto     =  Automatic BOX (if pick in empty area) or single object pick
   SIngle   =  One selection (any type)
   Add      =  Add mode: adds following objects to selection-set
   Remove   =  Remove mode: removes following objects from selection-set
   Undo     =  Undoes/removes last

When you are satisfied with the selection-set as it stands, enter RETURN
(except for Single mode, which does not require an extra RETURN).

See also:   chapter 2 of the AutoCAD Reference Manual.
\SETVAR
Many AutoCAD commands set various modes, sizes, and limits that then remain
in effect until you change them.  AutoCAD remembers these values by storing
them in a collection of "system variables".  The  SETVAR  command allows you
to examine and change these variables directly.

Format:     SETVAR  Variable name or ?:
                    Variable(s) to list <*>:

If you answer with "?" and a RETURN for the second prompt, AutoCAD flips 
to the text screen and displays the names and current values of all system 
variables.  Some system variables cannot be changed; these will be flagged 
in the output by the legend "(read only)" following the value.  If you enter 
the name of a variable that is not read-only, you will receive the prompt:

            New value for varname <current>:

where "varname" is replaced by the variable name, and "current" is the
current value of the variable.  If you respond to this prompt by
pressing RETURN or CTRL C, the variable will be left unchanged.

See also:   "Setvar Command -- Access to AutoCAD System Variables" in chapter 
            3 of the AutoCAD Reference Manual.
\SHADE
The SHADE command initiates the shading process.  The SHADEDGE and SHADEDIF
commands control the shade style and lighting.  The shading is performed in
two phases; in the first, a normal REGEN is performed.  The shaded image is
constructed in the second phase.  In the second phase of shading, AutoCAD
displays the percentage completed as it builds the image:

   Shading xx% done.
   Shading complete.

See also:   "Shade Command -- Shading and Hidden Line Display" in chapter 6 
            of the AutoCAD Reference Manual.
\SHADEDGE
SHADEDGE
0 = Faces shaded, edges not highlighted
1 = Faces shaded, edges drawn in background color
2 = Faces not filled, edges in entity color
3 = Faces in entity color, edges in background color
\SHADEDIF
SHADEDIF
Ratio of ambient to diffuse light (in percent of ambient light).
\SHAPE
The  SHAPE  command inserts a defined Shape into the drawing, provided that
the Shape definitions have been loaded using the LOAD command.

Format:     SHAPE  Shape name (or ?) <default>:  (shape name)
            Starting point:  (point)
            Height <1.0>:  (value)
            Rotation angle <0>:  (angle)

If you reply to the first prompt with "?", the following prompt is displayed:

            Shape(s) to list <*>: 

Entering a RETURN at this prompt will list the names of all Shapes currently 
loaded in the drawing.  Wild-card specifications are also allowed at this 
prompt.

See also:   "Shape Command" in chapter 4 of the AutoCAD Reference Manual.

\SH
\SHELL
The  SHELL  command allows you to execute utility programs or
user-supplied programs while still running AutoCAD.  The SH command
is similar, but allows only internal DOS commands to be executed.

Format:     SHELL
            DOS command:  (enter desired program name, or RETURN)

When the utility program is done, you can enter another AutoCAD command.

If you reply to the "DOS command:" prompt with RETURN, a prompt such
as "C>>" (a normal DOS prompt with an extra ">" appended) appears.  You
can now enter multiple DOS commands, just as you would at the normal
DOS prompt.  To return to AutoCAD from this mode, enter "exit".

NOTE:  There are some restrictions on the programs you can run from AutoCAD.

See also:   "Shell and Sh Commands -- Access to Operating System" in chapter
            3 of the AutoCAD Reference Manual.
\SKETCH
The  SKETCH  command allows you to do freehand drawings.  It requires
a pointing device such as a digitizing tablet or mouse.

Format:     SKETCH  Record increment <current>: (value)
            Sketch.  Pen eXit Quit Record Erase Connect .

Subcommands:

   P  -  Raises/lowers sketching pen
   X  -  Records temporary lines, and exit Sketch
   Q  -  Discards temporary lines, and exit Sketch
   R  -  Records temporary lines, but remain in Sketch
   E  -  Erases temporary lines from a specified point to the end
   C  -  Connect:  restarts sketch at last endpoint
   .  -  Draws line from end to current point (pen up)

See also:   "Sketch Command -- Freehand Drawing" in chapter 12 of the AutoCAD 
            Reference Manual.
\SKETCHINC
SKETCHINC
Sketch record increment.
\SKPOLY
SKPOLY
Sketch generates lines if 0, Polylines if 1.
\SNAP
The "snap resolution" is the spacing of an imaginary grid of dots with which
newly designated points must align.  The  SNAP  command allows you to change
the snap resolution or to turn it off entirely for freestyle drawing.

Format:     SNAP  Snap spacing or ON/OFF/Aspect/Rotate/Style <current>:

The meaning of each option is described next.

    NUMBER         - Sets alignment spacing
    ON             - Aligns designated points
    OFF            - Does not align designated points
    ROTATE         - Rotates snap grid by specified angle, and
                     sets a specified base point for the grid
    ASPECT         - Sets different X/Y snap resolution
    STYLE ISO      - Sets isometric Snap style
    STYLE STANDARD - Sets normal Snap style

See also:   "Snap Command" in chapter 8 of the AutoCAD Reference Manual.
\SNAPANG
SNAPANG
Snap/grid rotation angle (UCS-relative) for the current viewport.
\SNAPBASE
SNAPBASE
Snap/grid origin point for the current viewport (in UCS XY coordinates).
\SNAPISOPAIR
SNAPISOPAIR
Current isometric plane (0 = left, 1 = top, 2 = right)
for the current viewport.
\SNAPMODE
SNAPMODE
1 = snap on for current viewport; 0 = snap off.
\SNAPSTYL
SNAPSTYL
Snap style for current viewport (0 = standard, 1 = isometric).
\SNAPUNIT
SNAPUNIT
Snap spacing for current viewport, X and Y.
\SOLID
The  SOLID  command allows you to draw solid-filled regions by
entering them as quadrilateral or triangular sections.

Format:     SOLID  First point:  (point)
            Second point:  (point)
            Third point:   (point)
            Fourth point:  (point, or RETURN for triangular section)
            Third point:   (point, or RETURN to end solid)

See also:   "Solid Command" in chapter 4 of the AutoCAD Reference Manual.
\SPLFRAME
SPLFRAME
If = 1:

  - the control polygon for spline fit Polylines
    is to be displayed

  - only the defining mesh of a surface fit polygon mesh is 
    displayed (the fit surface is not displayed)

  - invisible edges of 3D Faces are displayed.

If = 0:

  - does not display the control polygon for spline
    fit Polylines

  - displays the fit surface of a polygon mesh, not the
    defining mesh 

  - does not display the invisible edges of 3D Faces

\SPLINESEGS
SPLINESEGS
The number of line segments to be generated for each spline patch.
\SPLINETYPE
SPLINETYPE
Type of spline curve to be generated by PEDIT Spline.
The valid values are:

  5  =  quadratic B-spline
  6  =  cubic B-spline.

\STATUS
The  STATUS  command produces a report describing the current drawing
extents and the current settings of various drawing modes and parameters.

Format:     STATUS

NOTE:  In dimensioning mode, the STATUS command lists the dimensioning
variables and their current values.

See also:   "Status Command" in chapter 3 of the AutoCAD Reference Manual.
\STRETCH
The  STRETCH  command allows you to move a selected portion of a
drawing, preserving connections to parts of the drawing left in place.
Connections made with Lines, Arcs, Traces, Solids, Polylines, and
3D Faces can be STRETCHed.

Format:     STRETCH  Select objects to stretch by window...
            Select objects:

While you may use any of AutoCAD's forms of object selection in the
STRETCH command, you must use a window-style selection (either Crossing
or Window) at least once.  The last window specified will be the window
moved by STRETCH.  Objects can be freely added and removed from the
selection set.

\
Once the selection set is specified, STRETCH asks you:

            Base point:
            New point:

and displays a rubber-band line attached to the base point you enter.  After
you pick the "New point", all the chosen objects will be moved or stretched 
as appropriate.

STRETCH behaves differently depending on the entity type it is examining.
Endpoints of Lines which fall within the box are moved and endpoints
outside the box are left unchanged.  Arcs are handled like Lines, except
that the center and start and end angles are adjusted so that the sagitta
of the Arc (distance from the midpoint of the chord to the Arc) is held
constant.  For Traces and Solids, vertices within the box are moved and
vertices outside are left unchanged.  Polylines are handled segment by
segment as if they were primitive Lines or Arcs.  Closed Polylines are
handled properly, and width, tangent, and curve-fitting information is
not modified by  STRETCH.

See also:   "Stretch Command" in chapter 5 of the AutoCAD Reference Manual.
\STRETCH,Select objects
While you can use any of AutoCAD's forms of object selection in the
STRETCH command, you must use a window-style selection (either Crossing
or Window) at least once.  The last window specified will be the window
moved by STRETCH.  Objects can be freely added and removed from the
selection set.

\STYLE
The  STYLE  command lets you create new text styles and modify existing
ones.  Each text style uses a particular font, to which you can apply
a fixed height, an expansion/compression width factor, and an obliquing
(slant) angle.  You can also select backward (mirrored right to left)
or upside-down (mirrored top to bottom) text generation.

Format:     STYLE  Text style name (or ?) <current>:  (name)
            Font file <default>:  (filename)
            Height <default>:  (value)
            Width factor <default>:  (scale factor)
            Obliquing angle <default>: (angle)
            Backwards? <N>
            Upside-down? <N>
            Vertical? <N>
            (name) is now the current text style.

The style you create or modify becomes the current text style used
for newly drawn Text entities.

See also:   "Style Command" in chapter 4 of the AutoCAD Reference Manual.
\SURFTAB1
SURFTAB1
Number of tabulations to be generated for RULESURF and TABSURF.  Also
mesh density in the M direction for REVSURF and EDGESURF.
\SURFTAB2
SURFTAB2
Mesh density in the N direction for REVSURF and EDGESURF.
\SURFTYPE
SURFTYPE
Type of surface fitting to be performed by PEDIT Smooth.
The valid values are:

   5  =  Quadratic B-spline surface
   6  =  Cubic B-spline surface
   8  =  Bezier surface.
\SURFU
SURFU
Surface density in the M direction. 
\SURFV
SURFV
Surface density in the N direction. 
\TABLET
The  TABLET  command is used when an existing hardcopy drawing is to be
"copied" with a digitizing tablet.  You can also use the TABLET command to
designate Tablet menu areas and the portion of the tablet to be used as the
screen pointing area.

Formats:    TABLET ON      - Turns tablet mode on
            TABLET OFF     - Turns tablet mode off
            TABLET CAL     - Calibrates tablet to existing drawing
            TABLET CFG     - Configures tablet menus and screen pointing area

See also:   "Tablet Command" in chapter 12 of the AutoCAD Reference Manual.
\TABSURF
The TABSURF command creates a polygon mesh representing a general tabulated
cylinder defined by a path and a direction vector.

Format:     TABSURF
            Select path curve:  (Pick an entity)
            Select direction vector:  (Pick an entity)

The path can be a Line, Arc, Circle, 2D Polyline, or 3D Polyline.  The
surface will be drawn starting at the point of the path curve closest to
your pick point.  The direction vector can be a Line, 2D Polyline, or 3D
Polyline.  It is determined by subtracting the endpoint of the entity
closest to your pick point from the entity's other endpoint.

The tabulated cylinder is constructed as a 2 x X polygon mesh, where X is
the number of tabulations to be generated in the M direction (specified
by the system variable SURFTAB1), while 2 tabulations are generated in
the N direction.

See also:   "Tabsurf Command -- Tabulated Surfaces" in chapter 4 of the 
            AutoCAD Reference Manual.
\TARGET
TARGET
Location (in UCS coordinates) of the target (look-at) point for
the current viewport (read-only).
\TDCREATE
TDCREATE
Time and date of drawing creation (read-only) (special format; see later).
\TDINDWG
TDINDWG
Total editing time (read-only) (special format; see later).
\TDUPDATE
TDUPDATE
Time and date of last update/save (read-only) (special format; see later).
\TDUSRTIMER
TDUSRTIMER
User elapsed timer (read-only) (special format; see later).
\TEMPPREFIX
TEMPPREFIX
This variable contains the directory name (if any) configured for
placement of temporary files, with a path separator appended if
necessary (read-only).
\TEXT
The  TEXT  command draws text of any desired size and angle.

Format:     TEXT  Justify/Style/<Start Point>: (point)
            Height <default>:  (value or two points)
            Rotation angle <default>:  (angle or point)
            Text:  (text string to be drawn)

If you enter a point for the "Starting point", the text is drawn
left-justified at that point.  Alternatively, you can reply:

   A - Aligns the text between two designated endpoints
       Height and Angle are not requested in this case
   C - Centers the text around a specified point
   F - Aligns the text between two designated endpoints with
       a specified height that varies only in its X scale factor
   M - Centers text both horizontally and vertically around a
       specified point
   R - Right-justifies the text at a designated endpoint
   S - Selects a different text style

  TL - Starts the top-left portion of text at a given start point
  TC - Centers the top of text at a given point
  TR - Ends the top of text at a given point

\
  ML - Starts the top-left portion of text at a given start point
  MC - Centers the middle of text at a given point
  MR - Ends the middle of text at a given point
  BL - Starts the bottom-left portion of text at a given start point
  BC - Centers the bottom of text at a given point
  BR - Ends the bottom of text at a given point

AutoCAD remembers the location and style of the most recent text item
drawn.  You can respond to the "Start point" prompt with RETURN to place
more text below the most recent text.

See also:   "Text Command" in chapter 4 of the AutoCAD Reference Manual.

\TEXT,Justify/Style/<Start
Enter a start point for text.  
Enter an "s" for the particular style you want to use or
Enter "j" for the justification start point or any of the following:
      
   A - Aligns the text between two designated endpoints
       Height and Angle are not requested in this case
   C - Centers the text around a specified point
   F - Aligns the text between two designated endpoints with
       a specified height that varies only in its X scale factor
   M - Centers text both horizontally and vertically around a
       specified point
   R - Right-justifies the text at a designated endpoint
   S - Selects a different text style
  TL - Starts the top-left portion of text at a given start point
  TC - Centers the top of text at a given point
  TR - Ends the top of text at a given point
  ML - Starts the top-left portion of text at a given start point
  MC - Centers the middle of text at a given point
  MR - Ends the middle of text at a given point
  BL - Starts the bottom-left portion of text at a given start point
  BC - Centers the bottom of text at a given point
  BR - Ends the bottom of text at a given point

\ATTDEF,Height
\DTEXT,Height
\TEXT,Height
Enter a number for height or pick another point (height is the distance
between the two points).
\ATTDEF,Text
\DTEXT,Text
\TEXT,Text
Enter text string at this prompt.
\TEXTEVAL
TEXTEVAL
If = 0, all responses to prompts for text strings and Attribute
values are taken literally.  If = 1, text starting with "(" or "!" is
evaluated as an AutoLISP expression, as for nontextual input.
NOTE:  The DTEXT command takes all input literally, regardless of
the setting of TEXTEVAL.
\TEXTSCR
\GRAPHSCR
The  GRAPHSCR  and  TEXTSCR  commands are provided as a convenient means
of selecting either the graphics or text screens from within menus and
scripts.

Format:     'GRAPHSCR   or   'TEXTSCR

See also:   "Graphscr and Textscr Commands" in chapter 11 of the AutoCAD
            Reference Manual.
\TEXTSIZE
TEXTSIZE
The default height for new Text entities drawn with the current text
style (meaningless if the style has a fixed height).
\TEXTSTYLE
TEXTSTYLE
This variable contains the name of the current text style (read-only).
\THICKNESS
THICKNESS
Current 3D thickness.
\TILEMODE
TILEMODE
1 = Release 10 compatibility mode (uses Vports)
0 = Enables paper space and Viewport entities
\TIME
TIME
When you enter the  TIME  command, the current status of the AutoCAD time
variables is displayed, as shown next.

      Command:  TIME

      Current time:                 08 NOV 1985 at 09:10:44.005
      Drawing created:              23 JUL 1985 at 07:21:30.648
      Drawing last updated:         18 SEP 1985 at 15:33:59.771
      Time in drawing editor:       0 days 00:02:54.520
      Elapsed timer:                0 days 00:00:30.772
      Timer on.

All times are displayed to the nearest millisecond using 24-hour "military"
format, where 15:31:00 means 3:31 in the afternoon.  The  TIME command
next prompts:

\
      Display/ON/OFF/Reset:

where:

  Display -  Repeats the display shown above, with updated times
  On      -  Starts the user elapsed timer if it was off (default on)
  Off     -  Stops the user elapsed timer
  Reset   -  Clears the user elapsed timer to zero

See also:   "Time Command" in chapter 3 of the AutoCAD Reference Manual.
\TRACE
The  TRACE  command allows you to draw Traces (solid-filled lines of 
specified width).

Format:     TRACE  Trace width <current>:
            From point:  (point)
            To point:  (point)
            To point:  (point)
            To point:  (RETURN to end trace entry)

Traces may be constrained to horizontal or vertical by the ORTHO command.

See also:   "Trace Command" in chapter 4 of the AutoCAD Reference Manual.
\TRACEWID
TRACEWID
Default trace width.
\TRIM
The  TRIM  command allows you to trim objects in a drawing so they
end precisely at a "cutting edge" defined by one or more other objects
in the drawing.

Format:     TRIM  Select cutting edge(s)...
            Select objects:

Lines, Arcs, Circles, and 2D Polylines (center line of Polyline) can serve
as boundary objects.  All the selected edges are highlighted and will
remain highlighted for the rest of the TRIM command.  Next the prompt:

            <Select object to trim>/Undo:

appears.  Pick objects to trim by pointing to the part of the object to be
trimmed.  Entering the Undo subcommand undoes the most recent change, back
to the first change made during the current TRIM command.  Answer with 
RETURN to end the command.  Lines, Arcs, Circles and open 2D Polylines 
can be trimmed.

\
If the selected point is between two intersections, the entity will be deleted
between the two intersection points.  2D Polylines are trimmed at their center
line.

See also:   "Trim Command" in chapter 5 of the AutoCAD Reference Manual.
\TRIM,Select objects
Lines, Arcs, Circles, and 2D Polylines (center line of Polyline) can serve
as boundary objects.  All the selected edges are highlighted and will
remain highlighted for the rest of the TRIM command.

\U
The  U  command causes the most recent operation to be undone.  The name
of the command being undone will be displayed.  You can enter the U
command as many times as you wish, backing up one step at a time, until
the drawing is in its original state.

See also:   "U Command" in chapter 5 of the AutoCAD Reference Manual.
\UCS
The  UCS  command is used to define or modify the current User Coordinate
System.

Format: UCS
        Origin/ZAxis/3point/Entity/View/X/Y/Z/Prev/Restore/Save/Del/?/<World>:

The options are described next:

    Del       - Deletes one or more saved coordinate systems
    Entity    - Defines a new UCS with the same extrusion direction
                as that of the selected entity
    Origin    - Changes the origin of the current coordinate system
    Prev      - Makes the previous coordinate system current
    Restore   - Restores a saved coordinate system as the current
                system
    Save      - Saves and names the current coordinate system
    View      - Establishes a new coordinate system whose Z axis is
                parallel to the current view direction

\
    World     - Sets the current UCS to equal the World Coordinate
                System
    X         - Rotates the current UCS around the X axis
    Y         - Rotates the current UCS around the Y axis
    Z         - Rotates the current UCS around the Z axis
    ZAxis     - Defines a UCS using two points, an origin point and
                a point on the positive portion of the Z axis
    3point    - Defines a UCS using three points, an origin point, a
                point on the positive portion of the X axis, and a
                point on the positive Y-portion of the XY plane
    ?         - Lists the name of the current UCS, and the name, origin,
                and XYZ axes for each saved coordinate system

See also:   "Ucs Command" in chapter 8 of the AutoCAD Reference Manual.
\UCSFOLLOW
UCSFOLLOW
If = 1, any UCS change causes an automatic change to plan view of the
new UCS (in the current viewport). If = 0, a UCS change doesn't affect
the view.
The setting of UCSFOLLOW is maintained separately for both spaces and can be
accessed in either space, but the setting is ignored while in paper space (it
is always treated as if set to 0).
\UCSICON
UCSICON
The  UCSICON  command is used to indicate the origin and orientation of the
current User Coordinate System.

Format:     UCSICON
            ON/OFF/All/Noorigin/ORigin <ON>:

The various options are described next.

    All       - Allows you to apply changes to all active viewports.
    ON        - Turns the coordinate system icon on.
    OFF       - Turns the coordinate system icon off.
    ORigin    - Forces the icon to be displayed at the origin of the current
                coordinate system.  If the origin is off screen, the icon is
                displayed at the lower-left corner of the screen.
    Noorigin  - Forces the icon to be displayed at the lower-left corner of
                the screen at all times.

See also:   "Ucsicon Command" in chapter 8 of the AutoCAD Reference Manual.

\
UCSICON is also a system variable and can be changed through the SETVAR 
command:

The coordinate system icon bit-code for the current viewport (sum of
the following):
   1  =  On - icon display enabled 
   2  =  Origin - if icon display is enabled, the icon floats to the
         UCS origin if possible
\UCSNAME
UCSNAME
Name of the current coordinate system for the current space. Returns a
null string if the current UCS is unnamed (read-only).
\UCSORG
UCSORG
The origin point of the current coordinate system for the current space.
This value is always returned in World coordinates (read-only).
\UCSXDIR
UCSXDIR
The X-direction of the current UCS for the current space (read-only).
\UCSYDIR
UCSYDIR
The Y-direction of the current UCS for the current space (read-only).
\UNDO
The  UNDO  command allows you to undo several commands at once and to perform
several special operations, such as marking a point to which you want to
return if things go wrong.  When you enter  UNDO, you get the prompt:

Format:     UNDO  Auto/Back/Control/End/Group/Mark/<Number>:

The default response is just to enter a number; this number of preceding
operations will be undone.

Mark    -  The Mark subcommand makes a special mark in the undo information,
           to which you can later back up with the Back subcommand.

Group   -  The Group and End subcommands cause a group of commands to be
End        treated as a single command for the purposes of U and UNDO.
           A Group, once Ended, is always treated as a single, indivisible
           operation.

Auto    -  The Auto subcommand requires an additional specification of on or
           off.  When UNDO Auto is on, any operation taken from the menu, no
           matter how complicated, will be treated as a single command,
           reversible by a single U command.

\
Back    -  The Back subcommand will take the drawing back to the state it was
           in when the most recent Mark subcommand was entered.

Control -  The Control subcommand allows you to limit the UNDO operation or
           disable it completely.  It gives a further prompt:

                   All/None/One <All>:

           All enables the full UNDO feature.  None disables the U and UNDO
           commands entirely.  Entering "1" limits U and UNDO to a single 
           operation.  This will make very modest demands on disk space.

           When UNDO is entered with One mode on, the prompt is reduced to:

                   Control/ <1>:

           When UNDO is entered with None mode on, the prompt is:

                   All/None/One <All>:

See also:   "Undo Command" in chapter 5 of the AutoCAD Reference Manual.
\UNITMODE
UNITMODE
0 = Displays feet and inches as previously 
1 = Displays feet and inches in input format 
\UNITS
The  UNITS  command governs the display and input formats for coordinates,
distances, and angles.

Format:     UNITS

You can then select one of the following display/input formats for
coordinates and distances:

   Scientific          1.55E+01     (15.5 drawing units)
   Decimal             15.50                "
   Engineering         1'-3.50"             "
   Architectural       1'-3 1/2"            "
   Fractional          15 1/2               "

You can also specify the precision (the number of digits after the decimal
point, or the smallest fraction of an inch to display).

\
You can select one of the following display/input formats for angles:

   Decimal degrees   42.5
   Deg/min/sec       42d30'0.0"
   Grads             47.2222g
   Radians           0.7418r
   Surveyor's units  N 47d30'0" E

See also:   "Units Command -- Format Control" in chapter 3 of the AutoCAD 
            Reference Manual.
\VIEW
The  VIEW  command can be used to associate a name with the current view
of the drawing, and to retrieve such named views.

Format:     VIEW  ?/Delete/Restore/Save/Window:  (select one)
            View name:  (name)

   ?        -  Lists the named views for this drawing
   Delete   -  Deletes the named view
   Restore  -  Displays the specified view
   Save     -  Attaches "name" to current view of drawing
   Window   -  Attaches "name" to specified window

See also:   "View Command -- Named Views" in chapter 6 of the AutoCAD 
            Reference Manual.
\USER1
\USER2
\USER3
\USER4
\USER5
USER1
USER2
USER3
USER4
USER5

Five variables for storage and retrieval of integer values.  Intended
for use by third-party developers.
\USERR1
\USERR2
\USERR3
\USERR4
\USERR5
USERR1
USERR2
USERR3
USERR4
USERR5

Five variables for storage and retrieval of real numbers.  Intended
for use by third-party developers.
\VIEWCTR
VIEWCTR
Center of view in current viewport, expressed in UCS
coordinates (read-only).
\VIEWDIR
VIEWDIR
The current viewport's viewing direction expressed in World coordinates.  This
describes the camera point as a 3D offset from the TARGET point (read-only).
\VIEWMODE
VIEWMODE
Viewing mode bit-code for the current viewport (read-only).
The value is the sum of the following:
   1  =  Perspective view active.
   2  =  Front clipping on.
   4  =  Back clipping on.
   8  =  UCS follow mode on.
  16  =  Front clip not at eye.  If on, the front clip distance (FRONTZ)
         determines the front clipping plane.  If off, FRONTZ is ignored 
         and the front clipping plane is set to pass through the camera 
         point (i.e., vectors behind the camera are not displayed).  This 
         flag is ignored if the front clipping bit (2) is off.
\VIEWRES
The  VIEWRES  command controls "fast zoom" mode and sets the resolution
for circle and arc generation.

Format:     VIEWRES  Do you want fast zooms? <Y>
            Enter circle zoom percent (1-20000) <100>:

If you respond to the first prompt with "n", all ZOOMs, PANs, and "VIEW
Restores" will perform regenerations, and thus run at the same speed as in
previous versions of AutoCAD.  If you respond "y", AutoCAD will maintain a
large virtual screen for your drawing, and will perform ZOOMs, PANs, and
"VIEW Restores" at REDRAW speed whenever possible.

\
The "circle zoom percent" gives you control over the accuracy with which
circles and arcs are drawn.  Circles and arcs are drawn using many short
line segments; the more lines, the smoother the circle or arc looks.  It
takes time to compute and display these lines, however.

A "circle zoom percent" of 100 tells AutoCAD to us its internal method
of determining how many lines without alteration.  If you set it to higher
than 100, more lines than normal will be drawn for each circle and arc
whenever a REGEN occurs.  If you want circles and arcs to be composed of
fewer lines than normal (for faster drawing), you can enter a number less
than 100.

See also:   "Viewres Command" in chapter 6 of the AutoCAD Reference Manual.
\VIEWSIZE
VIEWSIZE
Height of view in current viewport, expressed in drawing units (read-only).
\VIEWTWIST
VIEWTWIST
View twist angle for the current viewport (read-only).
\VISRETAIN
When VISRETAIN is set to 0 (the default), On/Off and Freeze/Thaw
settings for Xref-dependent layers are determined by their settings in
the source drawing. This means that changes you make to these settings
in the target drawing are discarded each time the Xref is reloaded.
(AutoCAD reloads Xrefs when you load the target drawing into the
Drawing Editor, plot it from the Main Menu, or use the  Reload  or Path
options of the XREF command.)

When VISRETAIN is set to 1, On/Off and Freeze/Thaw settings for
Xref-dependent layers are determined by their settings in the target
drawing. This means that any changes you make to these settings in the
target drawing are preserved during reload operations.

Color and linetype settings are not affected by VISRETAIN, but are
always reset.
\VPLAYER
The VPLAYER command lets you control the visibility of layers on a 
per-viewport basis; that is, you can make a layer visible in one viewport
(or a specific set of viewports) but invisible in all other viewports.  
This can be useful, for example, when you want to create an "annotation 
layer" that is visible only in a given viewport; AutoCAD plots entities on
this layer only when plotting a viewport in which the layer is visible.           
In order to use the VPLAYER command, the system variable TILEMODE must be
set to 0 (off).

Format:     VPLAYER
            ?/Freeze/Thaw/Reset/Newfrz/Vpvisdflt:

  ?         - Use this option to obtain a list of layers that are frozen      
              in a selected viewport.     
  Freeze    - This option allows you to freeze layers in a selected 
              viewport.
  Thaw      - This option thaws layers that were frozen in specific viewports
              using Vplayer Freeze or the DDLMODES command.
  Reset     - Restores the default visibility setting for a layer in a given
              viewport.

\
  Newfrz    - Creates new layers that are frozen in all viewports.  This 
              option provides a handy shortcut when you want to create a new
              layer that is visible only in a single viewport.
  Vpvisdflt - This option allows you to set a default visibility-per-viewport 
              for any layer.  This default setting determines the  
              frozen/thawed state of the layer in new viewports.

See also:  "Vplayer Command" in chapter 7 of the AutoCAD Reference Manual.

\VPOINT
The  VPOINT  command asks you to select a 3D viewpoint, and regenerates
the drawing as if you were viewing it from that point.  All entities are
drawn with the correct elevation and thickness, and projected as you would
see them from the specified viewpoint.

Format:     VPOINT
            Rotate/<View point> <current X, Y, Z>:

If you enter RETURN in response to the "Enter view point" prompt, a compass 
and axes tripod will be displayed to assist you in selecting a viewpoint.  
A viewpoint of 0,0,1 will return you to the normal 2D "top" or "plan"  view.  
You can also use either VIEW Restore or ZOOM Previous to restore a prior 
view to the screen.

The Rotate option lets you specify the new viewpoint in terms of two
angles; one with respect to the X axis (in the XY plane) and another
with respect to the Z axis.

See also:   "Vpoint Command -- Select 3D Viewpoint" in chapter 6 of the 
            AutoCAD Reference Manual.
\VPOINTX
\VPOINTY
\VPOINTZ
X, Y, and Z components of the current viewport's viewing direction,
expressed in World coordinates.  This describes the camera point as a
3D offset from the TARGET point.  These variables will be
discontinued in a future release, since the same values are now
returned by the single variable VIEWDIR (read-only).
\VIEWPORTS
\VPORTS
The  VIEWPORTS  (or VPORTS) command lets you divide the AutoCAD graphics
display into multiple viewports, each of which can contain a different
view of the current drawing.

Format:     VIEWPORTS
            Save/Restore/Delete/Join/SIngle/?/2/<3>/4:

   Save     - Names the current viewport configuration and saves it for
              later retrieval.
   Restore  - Replaces current viewport with named viewport configuration.
   Delete   - Removes a viewport configuration from the list of saved ones.
   Join     - Merges two viewports.
   SIngle   - Turns off multiple views and returns to a single view. The
              single view is taken from the current active viewport.
   ?        - Lists the named and current viewport configurations.
   2        - Divides the current viewport in half.
   3        - Divides the current viewport into 3 viewports.
   4        - Divides the current viewport into 4 equal viewports.

\
Note that you can move the cursor around the screen from viewport to
viewport, but only when it is in the current viewport will it appear as a
"drawing" cursor (crosshairs, window selection box, etc.); in any other
viewport it will appear as a small arrow.  Pressing the "select" button
on your digitizer, while the cursor is in the arrow form, causes the
viewport it is in to become the new current viewport.

See also:   "Vports Command -- Using Tiled Viewports" in chapter 6 of the 
            AutoCAD Reference Manual.
\VSLIDE
The  VSLIDE  command permits viewing of a slide made by the MSLIDE command,
or of a slide from a library constructed by the SLIDELIB utility program.

Formats:    VSLIDE  Slide file: name
            VSLIDE  Slide file: library(slide-name)

The current display is replaced by the named slide.  To retrieve the
display of the current drawing, use the REDRAW command.

If you are using a command script to display a series of slides in
succession, you can overlap the time necessary to load the next slide
from disk with the viewing time of the current slide.  This is done by
preceding the filename with an asterisk.

Format:    VSLIDE  Slide file: *name

The named slide is read from disk into memory, but is not displayed
until the next VSLIDE command is executed.

See also:   "Vslide Command -- Viewing a Slide" in chapter 11 of the AutoCAD 
            Reference Manual.
\VSMAX
VSMAX
The upper-right corner of the current viewport's virtual screen,
expressed in UCS coordinates (read only).
\VSMIN
VSMIN
The lower-left corner of the current viewport's virtual screen,
expressed in UCS coordinates (read only).
\WBLOCK
The  WBLOCK  command writes all or part of a drawing out to a disk file.

Format:     WBLOCK  Filename: (output file name)
            Block name: (see below)

No file type should be specified; type ".dwg" is assumed.
The different responses to the "Block name" prompt are:

   name      - The named Block is written to the disk file.
   =         - Same as above, but the Block name is the same
               as the filename.  Places the entities of the 
               Block definition in model space of the output
               drawing.
   *         - The entire drawing is written to disk, except for
               unreferenced Block Definitions.  Places all entities
               in the space that they are currently in, like END and
               SAVE.

\
   (blank)   - Permits selection of individual objects to be written
               to disk.  Also requests an insertion base point.  Places
               the selected entities in the new drawing's model space,
               regardless of which space is current.

See also:   "Wblock Command -- Write Block to Disk" in chapter 9 of the 
            AutoCAD Reference Manual.
\WORLDUCS
WORLDUCS
If = 1, the current UCS is the same as the World Coordinate System
If = 0, it is not (read-only)
\WORLDVIEW
WORLDVIEW
DVIEW and VPOINT command input is relative to the current UCS.  If
this variable is set to 1, the current UCS is changed to the WCS for
the duration of a DVIEW or VPOINT command.  Default value = 0.
\XBIND
The  XBIND command allows you to "bind" one or more dependent symbols of
an external reference.  (You should use XBIND when you want to bind only a
subset of an external reference's dependent symbols.  If you want to bind
an entire external reference you should use the Bind option of the XREF
command.)  Normally, dependent symbols of an external reference--a layer 
or Block, for example--are discarded at the end of the drawing session.

Format:     XBIND
            Block/Dimstyle/LAyer/LType/Style:

Reply with the object type you want to XBIND.  

See also:   "Xbind Command -- Add Dependent Symbols to Your Drawing" in 
            chapter 9 of the AutoCAD Reference Manual.
\XREF
The XREF command attaches external references to your drawing.

Format:     XREF
            ?/Bind/Detach/Path/Reload/<Attach>:

   Attach    - Allows you to attach a new Xref to your drawing or insert a
               copy of an Xref that you've already attached.
   ?         - Lists the Xrefs in your drawing and the drawing file 
               associated with each one.
   Bind      - Converts an external reference to an ordinary block.  Bind 
               also converts dependent symbols (blocks, dimstyles, layers,
               linetypes, styles, and nested Xrefs) of the former Xref into 
               permanent symbols.
   Detach    - Erases all insertions of an external reference and marks its
               definition for deletion.
   Path      - Allows the editing of the path field.
   Reload    - Updates one or more external references without leaving the 
               drawing editor.

\
   The Xref command options ?, bind, detach, path and reload prompt for an 
   Xref name.  You can respond to the prompt with the name of a single Xref, 
   a list of Xrefs delimited by commas, or a valid wild-card specification.
   You can enter a null response to exit the command without taking any 
   action.

See also:   "Xref Command -- Create and Manage External References" in 
            chapter 9 of the AutoCAD Reference Manual.
\ATTDEF,Rotation angle
\DTEXT,Rotation angle
\INSERT,Rotation angle
\MINSERT,Rotation angle
\SNAP,Rotation angle
\TEXT,Rotation angle
\XREF,Rotation angle
Enter a number for the rotation angle or pick a point.

Enter RETURN to accept the default rotation angle.

\INSERT,Block name (or ?)
\MINSERT,Block name (or ?)
\XREF,Block name (or ?)
Enter the name of a Block or a drawing file.

Normally, the Block is inserted as a single entity.  However, if you precede
the Block name with a "*", its individual components are inserted.  In this
case, only one scale factor will be requested later.

If the named Block is not defined in the current drawing, but
another drawing exists with that name, a Block Definition is first
created from the other drawing.
\INSERT,Insertion point
\MINSERT,Insertion point
\XREF,Insertion point
Pick a point (or enter a coordinate) to position the Block.

If you know the scale or rotation, you can enter one of the following
options at this prompt to "preset" the scale or rotation for the drag
image.

    Scale   - Presets (uniform) scale factor
    XScale  - Presets X scale factor
    YScale  - Presets Y scale factor
    ZScale  - Presets Z scale factor
    Rotate  - Presets rotation amount

If you've specified one of these options, the corresponding prompt that
normally follows entry of the insertion point will be skipped.
(Variations of these options, with a leading "p", can be used to affect
only the drag image, issuing the scale and rotation prompts as usual
after the insertion point has been established.)

\INSERT,X scale factor <1> / Corner / XYZ
\MINSERT,X scale factor <1> / Corner / XYZ
\XREF,X scale factor <1> / Corner / XYZ
Enter a number for the X scaling factor or hit RETURN to accept the
default scaling factor of 1.

Alternatively, a point can be picked and the distance between this point
and the insertion point will be used as the scaling factor.

Entering "c" at this prompt allows you to define the X and Y scales at the
same time, using the insertion point and another point as the corners of
a box.  The X and Y dimensions of the box become the X and Y scale factors.

Enter "xyz" to let AutoCAD know that you wish to specify all three scale
factors.

\INSERT, Y scale factor (default=X)
\MINSERT, Y scale factor (default=X)
\XREF, Y scale factor (default=X)

Enter a number to define the Y scaling factor or hit RETURN to accept
a scaling factor equal to the X scaling factor.

\INSERT, Z scale factor (default=X)
\MINSERT, Z scale factor (default=X)
\XREF, Z scale factor (default=X)

Enter a number to define the Z scaling factor or hit RETURN to accept
a scaling factor equal to the X scaling factor.
\ZOOM
The  ZOOM  command magnifies the drawing on the display screen (to see more
detail) or shrinks it (to view more of the drawing with less detail).

    ZOOM number   - Magnification relative to ZOOM All display
                    (ZOOM All = ZOOM 1).  Higher numbers (like 2.5)
                    magnify, lower numbers (like 0.5) shrink.
    ZOOM numberX  - Magnification relative to current display (1X).
    ZOOM All      - Places entire drawing (all visible layers) on
                    display at once.
    ZOOM Center   - Specifies center point and new display height.
    ZOOM Dynamic  - Permits you to pan a box representing the viewing screen
                    around the entire generated portion of the drawing and
                    enlarge or shrink it in a dynamic, graphic manner.
    ZOOM Extents  - Displays current drawing content as large as possible.
    ZOOM Left     - Specifies lower-left corner and new display height.
    ZOOM Previous - Restores previous view.
    ZOOM Window   - Designates rectangular area to be drawn as large
                    as possible.
    ZOOM Vmax     - Zooms out as far as possible in the 32K space without
                    forcing an "f" REGEN.

See also:   "Zoom Command" in chapter 6 of the AutoCAD Reference Manual.

\3DFACE
The  3DFACE  command is similar to the SOLID command, but it accepts
Z coordinates for the corner points and can generate a section of a
plane or a nonplanar figure.

Format:     3DFACE  First point:  (3D point)
            Second point:  (3D point)
            Third point:   (3D point)
            Fourth point:  (3D point, or RETURN for triangular section)
            Third point:   (3D point, or RETURN to end 3D face)

To draw a face with four points, enter the points in a clockwise
or counterclockwise fashion to avoid a "bowtie" figure.  Note that
this is different from the order expected by the SOLID command.

To make an edge of the 3D Face invisible, enter "i" preceding the first point 
of that edge. The "Invisible" specification must precede any object snap 
modes, XYZ filters, or coordinate input for that edge.

3D Faces are not solid-filled.  The HIDE command considers them to be
opaque if they are planar.  If nonplanar, HIDE draws a "wireframe"
representation.

See also:   "3Dface Command" in chapter 4 of the AutoCAD Reference Manual.
\3DMESH
The  3DMESH  command allows you to define a three-dimensional polygon
mesh by specifying its size (in terms of M and N) and the location of
each vertex in the mesh.  Vertices can be specified as 2D or 3D points.
The total number of vertices to be specified will equal N times N.

Format:      3DMESH
             Mesh M size:  (Enter a value)
             Mesh N size:  (Enter a value)
             Vertex (m,n): (Select a point)

Vertices can be located at any distance relative to one another.
After all vertices have been specified, AutoCAD draws the mesh.

Polygon meshes created by the 3DMESH command are always open in both
the M and N directions.  You can close the mesh in either or both
directions by editing it with the PEDIT command.

See also:   "3Dmesh Command -- Topologically Rectangular Polygon Meshes" in 
            chapter 4 of the AutoCAD Reference Manual.

\3DPOLY
The  3DPOLY  command creates a general, three dimensional Polyline.  A
3D Polyline consists entirely of straight-line segments connecting the
vertices of the Polyline.  You can supply 3D (x,y,z) coordinates for any
or all of these vertex locations.  Arc segments, width, taper, and other
attributes of 2D Polylines are not supported.

Format:      3DPOLY  First point:  (Select a point)
             Close/Undo/<Endpoint of line>:

    Close             - Closes the polyline back to the first point
    Undo              - Deletes the last segment entered
    Endpoint of line  - Specifies a point

Pressing RETURN or the space bar ends the 3D Polyline at the last endpoint.
If you wish to edit the 3D Polyline, use the PEDIT command.

See also:   "3Dpoly Command -- #D Polylines" in chapter 4 of the AutoCAD 
            Reference Manual.
\*,Select objects:
Select one or more objects for the current command:

   (point)  =  One object
   Multiple =  Multiple objects selected by pointing
   Last     =  Last object
   Previous =  All objects in the Previous selection-set
   Window   =  Objects within Window
   Crossing =  Objects within or Crossing window
   BOX      =  Automatic Crossing (to the left) or Window (to the right)
   AUto     =  Automatic BOX (if pick in empty area) or single object pick
   SIngle   =  One selection (any type)
   Add      =  Add mode: adds following objects to selection-set
   Remove   =  Remove mode: removes following objects from selection-set
   Undo     =  Undoes/removes last

When you are satisfied with the selection-set as it stands, enter RETURN
(except for Single mode, which does not require an extra RETURN).

See also:   chapter 2 of the AutoCAD Reference Manual.

\SOLAMEVER

SOLAMever (or AMever)

This variable displays the version and release number of the AutoCAD 
AME software. This is a read-only variable, you cannot change its 
value. Entering the SOLAMEVAR command returns a value like: 

    SOLAMEVER = AME version 1.00 (read only)

\SOLAREA
The SOLAREA command calculates and displays the surface area of solid 
objects. 

    Select objects: 

Pick the solid objects whose surface areas you want to calculate. The 
value displayed is the sum of the surface areas of the selected objects. 
This example shows the results of such a calculation: 

    Surface area of solids is 56.71 sq cm

The area is calculated by meshing the surfaces of the solids and then 
adding the area of the faces of the mesh. Because the solid is being 
represented as a mesh, the surface area is only an approximation, 
especially in the case of curved surfaces. Increasing the wire density 
of the solid improves the accuracy of this approximation. You can do 
this by using the SOLVAR command to set the SOLWDENS variable.

The calculated area is displayed in the units set by the SOLAREAU 
variable.

\SOLAREAU

SOLAReau (or AReau)

This variable sets the unit of measure for area calculations.

    Area units <current unit>: 

Enter a unit of area. You can find the available units of area in the 
acad.unt file.

For more information, see the SOLAREA command.

\SOLAXCOL

SOLAXcol (or AXcol)

This variable sets the color of the coordinate system icon used in 
SOLMOVE and SOLCHP commands.

    Solid axis color (1 to 8) <current color>: 

Enter an integer from 1 through 8.

\SOLBOX
The SOLBOX command creates a three-dimensional box. You create a box 
by locating its diagonally opposite corners or by locating the 
opposite corners of its base rectangle and then assigning a height to 
it. You can also create the base rectangle by defining its length and 
width separately. The base of the box is always defined parallel to 
the current construction plane (the XY plane of the current UCS).

    Corner of box:

Locate a corner for the origin (starting point) of the box. If your 
viewing plane is parallel to the current construction plane, a 
rectangle rubber bands from this point to help you visualize the size 
of the base rectangle.

    Cube/Length/<Other corner>:

\
Cube Option

The Cube option creates a box with sides of equal length. You create it 
just like a box, except that you need to define only one length.

    Length:

You define the length by entering a nonzero value or by locating two points.

\
Length Option

The Length option lets you create a box by defining its length, width, 
and height. The length corresponds to the X axis, the width to the Y 
axis, and height to the Z axis of the current UCS. 

    Length:

    Width:

    Height:

You define the length, width, and height by entering a nonzero value 
or by locating two points.

\
<Other corner> Option

The <Other corner> option lets you create a box by either locating its 
diagonally opposite corners or the opposite corners of its base 
rectangle and then its height. After locating a point for the opposite 
corner, you are prompted to enter the box's height. If the <Other 
corner> point has the same Z value in the current UCS as the first 
corner point, you see this prompt: 

    Height: 

Otherwise, you see this prompt: 

    Height <height>: 

In either case, you define the height by entering a nonzero value or 
locating two points. In the later example, you can accept the default 
height by pressing RETURN. 

\SOLCONE
The SOLCONE command creates a three-dimensional cone. You must define 
the size of the cone's circular or elliptical base as well as the height 
of the cone.

    Elliptical/<Center point>:

\
Elliptical Option

This option is only available in the optional Advanced Modeling 
Extension software. Selecting this option indicates that the base of 
the cone is an ellipse. The prompts are the same as those for creating 
an ellipse in AutoCAD.

    <Axis endpoint 1>/Center:

\
<Axis endpoint 1>

You automatically select this option by locating a point. With this 
option you can create the elliptical base of the cone by locating 
points to define the diameter of one axis and the radius of the other. 

    Axis endpoint 2: 

    Other axis distance: 

Define the radius of the other axis by entering a positive nonzero value
or locating a point.

    Height of cone: 

Define the height of the cone by entering a nonzero value or by locating 
two points.  Negative heights are allowed.

\
Center

Selecting this option lets you define the elliptical base of the cone 
by locating its center point followed by the radius of each axis.

    Center of ellipse: 

    Axis endpoint: 

    Other axis distance: 

Define the radius of the other axis by entering a positive nonzero 
value or by locating a point.

    Height of cone: 

Define the height of the cone by entering a nonzero value or by locating 
two points.

\
<Center point> Option

You select this option by locating a point for the center of the base 
of the cone. Selecting this option means the base of the cone is to be 
a circle. 

    Diameter/<Radius>: 

Diameter

You create the circular base of the cone by defining its diameter.

    Diameter: 

Define the diameter of the base circle by entering a positive nonzero 
value or by locating a point.

    Height of cone: 

Define the height of the cone by entering a nonzero value or by locating 
two points.

\
<Radius>

You select this option by locating a point or by entering a positive 
nonzero value for the circle's radius. After you define the base, 
enter the height.

    Height of cone: 

Define the height of the cone by entering a nonzero value or by locating 
two points.

\SOLCHAM
The SOLCHAM command creates a solid primitive called a chamfer and 
automatically unions or subtracts it from the selected solid. SOLCHAM 
lets you bevel the concave and convex edges of an existing solid.

The SOLCHAM command requires that you first select a base surface, then 
the edges, and then enter the dimensions of the chamfer.

    Select base surface: 

Picking an edge on the solid object highlights one of the two surfaces 
sharing that edge and displays this prompt: 

    <OK>/Next: 

If this is the surface you want, press RETURN to accept it. If this is 
not the surface you want, enter "next" to highlight the adjoining 
surface and then press RETURN.

    Select edges to be chamfered (Press ENTER when done): 

Pick the edges of the highlighted surface you want to chamfer. After 
you have selected the edges you want, press RETURN. If you select an 
edge that is not adjacent to the highlighted surface it will not be 
chamfered.
\
    Enter distance along first surface <size>: 

Define the distance of the chamfer on the base surface by entering a 
positive nonzero value or by locating two points. The distance is 
measured perpendicular from the edge of the surface to the point where 
the chamfer intersects the surface.

    Enter distance along second surface <size>: 

Define the size of the chamfer along the second surface by entering a 
positive nonzero value or by locating two points.

\SOLCHP
The SOLCHP command lets you view and change a solid primitive, even if 
it is part of a composite solid. You can make changes in a solid 
primitive's physical dimensions and color. You can also replace and 
delete solid primitives with this command. 

You are first prompted to select a solid object.

    Select solid: 

If the selected object is a composite solid (not a solid primitive), 
you are prompted:

    Select primitive: 

Pick the primitive you want to change. It must be part of the solid 
you selected previously.

    Color/Delete/Evaluate/Instance/Move/Next/Pick/Replace/Size/eXit <N>: 

Enter the option indicating the change to make to the primitive. 

\
Color Option

This option changes the color assigned to the primitive.

    New color <current color number>: 

Enter a number from 1 through 255 to indicate the new color of the 
primitive. You can use the standard seven color names in place of the 
numbers 1 through 7.

\
Delete Option

The Delete option erases the primitive. If it is a stand-alone 
primitive, the command deletes it in its entirety. If the solid 
primitive is part of a composite solid, the command deletes it from 
the CSG tree of the solid and issues the prompt:

    Retain detached primitive? <N>: 

Answering "yes" creates a stand-alone (top-level) primitive of the 
deleted item. 

Evaluate Option

The Evaluate option forces a reevaluation of the solid's CSG tree. 
This is useful when you have made many changes that affect the 
structure of a composite solid.

Instance Option

This option creates a copy of the primitive as a separate solid object. 
The copy might not be readily evident, because it appears at the same 
location in the drawing as the original primitive. This option is most 
useful when used in conjunction with the Replace option.
\
Move Option

This option lets you move the primitive by locating two points to 
define a displacement.

    Base point of displacement: 

Locate the first point of displacement.

    Second point of displacement: 

Locate the second point of displacement. The distance between the 
first point and the second point is calculated with respect to the 
current UCS.

Next Option

The Next option selects another primitive in a composite solid.

\
Pick Option 

This option lets you graphically pick another primitive to change.

    Select primitive: 

Pick the primitive you want to change. It must be part of the solid 
you originally selected.

\
Replace Option 

This option replaces the selected primitive with another solid.

    Select solid to replace primitive ... 

Pick the solid object that you want to replace the currently selected 
primitive. Only top-level solids (composite solids or primitives) can 
be used as the replacement. If you want to replace the primitive with 
a member of the selected solid or a member of a different composite 
solid, you must first use the Instance option on that member. If the 
original primitive is part of a composite solid, it is replaced in the 
CSG tree by the selected solid and issues this prompt:

    Retain detached primitive? <N>: 

Answering "yes" creates a stand-alone (top-level) primitive of the 
replaced item.

The physical location of the replacement solid is not altered during 
the replacement (i.e.: it does not move it to the location of the 
primitive being replaced); the replacement is made only in the structure
of the CSG tree of the composite solid.

\
Size Option

This option lets you change the physical dimensions of the selected 
primitive. The current dimensional values are displayed and you are 
prompted to enter a new value for each dimension. The prompts for 
changing the dimensions of each of the primitives types are as follows:

Box or Wedge

    Specify x <current>:

    Specify y <current>:

    Specify z <current>:

\
Cone or Cylinder

    Specify x radius <current>:

    Specify y radius <current>:

    Specify height <current>:

Changing the X radius of a cylindrical cone or cylinder automatically 
changes the Y radius to the same value. This does not apply to 
elliptical cones or cylinders. You can change a cylindrical cone or 
cylinder into an elliptical one (or vice versa) by entering both the X 
and Y radius values.

Sphere

    Specify radius <current>:

Torus

    Specify major <current>:

    Specify minor <current>:

\
Extrusion

    Change shape? <N>:

If you answer "no" to this prompt, you see the following prompts which 
let you change the height of the extrusion, or the taper angle, or both.

    Specify height of extrusion <current>:

    Specify taper angle of extrusion <current>:

Answering "yes" to the Change Shape? prompt displays the following 
message.

    A 2D Pline will be displayed upon exiting from SOLCHP. 
    Height of extrusion = current value 
    Taper angle of extrusion = current value

To change the shape of the extrusion, exit the SOLCHP command. A 
Polyline is displayed that is the 2D profile of the extrusion. You can 
use AutoCAD commands, like PEDIT, to modify the Polyline. Then use the 
SOLEXT command to extrude the Polyline. Finally, use the Replace option 
of the SOLCHP command to exchange the original extrusion for the 
new one.

\
Revolution

    <Angle>/AXis/Shape:

Entering the default option of Angle displays the following prompt 
which lets you change the included angle of the revolution.

    Specify angle <current>:

    Specify taper angle of extrusion <current>:

Entering the Axis or Shape options displays the following message.

    A 2d Pline and axis will be displayed upon exiting from SOLCHP.
    Angle of revolution = current value

To change the axis of revolution, exit the SOLCHP command. A Polyline 
is displayed that is the 2D profile of the extrusion and a line is 
displayed for the axis or revolution. You can use AutoCAD commands, 
like PEDIT, to modify the Polyline and line. Then use the SOLREV 
command to revolve the Polyline about the axis. Finally, use the 
Replace option of the SOLCHP command to exchange the original 
revolution for the new one.

\
<eXit> Option

This option terminates the command. The entire CSG tree is reevaluated 
to determine the effects on the solid of the changes to the primitive.

\SOLCYL
The SOLCYL command lets you create a solid column the size and height 
you want. This is similar to an extruded circle or ellipse (without a 
taper). You must define the size of the cylinder's circular or elliptical
base as well as the height of the cylinder.

    Elliptical/<Center point>:

\
Elliptical Option

This option is only available in the optional Advanced Modeling Extension 
software. Selecting this option indicates that the base of the cylinder 
is to be an ellipse. The prompts are the same as those for creating an 
ellipse in AutoCAD.

    <Axis endpoint 1>/Center:

\
<Axis endpoint 1>

You automatically select this option by locating a point. With this 
option you can create the elliptical base of the cylinder by locating 
points to define the diameter of one axis and the radius of the other. 

    Axis endpoint 2: 

    Other axis distance: 

Define the radius of the other axis by entering a positive nonzero 
value or by locating a point.

    Height of cylinder: 

Define the height of the cylinder by entering a nonzero value or by
locating two points.  Negative heights are allowed.

\
Center

Selecting this option lets you define the elliptical base of the 
cylinder by locating its center point followed by the radius of each 
axis.

    Center of ellipse: 

    Axis endpoint: 

    Other axis distance: 

Define the radius of the other axis by entering a positive nonzero 
value or by locating a point.

    Height of cylinder: 

Define the height of the cylinder by entering a nonzero value or by
locating two points.

\
<Center point> Option

You select this option by locating a point for the center of the base 
of the cylinder. Selecting this option means the base of the cylinder 
is to be a circle. 

    Diameter/<Radius>: 

Diameter

You create the circular base of the cylinder by defining its diameter.

    Diameter: 

Define the diameter of the base circle by entering a positive nonzero 
value or by locating a point.

    Height of cylinder: 

Define the height of the cylinder by entering a nonzero value or by
locating two points.

\
<Radius>

You select this option by locating a point or by entering a positive 
nonzero value for the circle's radius. After you define the base, 
enter the height.

    Height of cylinder: 

Define the height of the cylinder by entering a nonzero value or by
locating two points.

\SOLDECOMP

SOLDecomp (or Decomp)

This variable sets the mass properties decomposition direction.

    Mass properties decomposition axis (X, Y, or Z) <X>: 

Enter X, Y, or Z for the axis you want.

For more information, see the SOLMASSP command.

\SOLDELENT

SOLDELent (or DELent)

This variable governs whether a 2D entity that has been extruded, 
revolved, or solidified is automatically deleted.

    Delete the entity (1 - never, 2 - ask, 3 - always) <3>: 

Enter "1", "2", or "3". Enter "1" if you don't want to delete the entity 
and don't want to be asked about deletion. Enter "2" to be asked about 
deletion; the default answer to this question is no. Enter "3" to delete 
the entity with no question asked.

For more information, see the SOLEXT, SOLREV, or SOLIDIFY commands.

\SOLDISPLAY

SOLDIsplay (or DIsplay)

This variable determines whether the default display of solids is a 
wireframe or mesh representation.
 
    Mesh/<Wire>:

Enter "mesh" to display the solids as a mesh or "wire" to display them as 
a wireframe.

For more information, see the SOLWIRE or SOLMESH commands.

\SOLEXT
The SOLEXT command lets you create unique solid primitives by 
extruding existing Polylines and circles. If you are using the optional 
Advanced Modeling Extension software, you can taper the sides of the 
extrusion.

You can extrude only Polyline, Polygon, Circle, Ellipse, and 3D Poly 
entities. If the selected polyline has width, the command ignores the 
width and makes the extrusion from the center of the Polyline path. A 
two-dimensional Polyline (Polyline or Polygon) is extruded 
perpendicular to its 2D plane. A three-dimensional Polyline (3D Poly) 
is extruded perpendicular to the XY plane of the Polyline's ECS 
starting at the absolute zero Z axis coordinate (in other words, Z 
axis coordinates are ignored).

The Polyline must contain at least two line segments (three vertices). 
If the selected Polyline is not closed, the command creates the 
extruded solid as if the Polyline were closed by a line. Polylines 
with crossing or intersecting segments cannot be extruded.

\
You are first prompted to select the objects to be extruded.

    Select polyline & circles to be extruded:

Pick the objects that you want to extrude. Multiple objects can be 
extruded in a single use of the command. If objects are included in 
the selection set that cannot be extruded, they are ignored.

    Height of extrusion: 

Define the height of the extrusion by entering a nonzero value or by
locating two points.

    Extrusion taper angle from Z <0>: 

Enter the number of degrees you want the sides tapered. The taper 
value must be zero or greater, but less than 90 degrees. You can only 
taper in from the base Polyline, not out. In other words, the extruded
end cannot be larger than the original path Polyline. The default angle, 
zero, will extrude the Polyline perpendicular to the path Polyline.

\
The SOLDELENT variable controls whether the selected objects are deleted
or retained in your drawing after they are extruded. You can set this 
variable so that the objects are always retained, automatically deleted, or 
so that you are asked which. The startup setting is to delete the objects. 
See the SOLVAR command for more information.

Important:  Tapered extrusions are available only with the optional 
Advanced Modeling Extension software. Extrusions created or loaded 
into AMElite are limited to an extrusion angle of zero.
 
\SOLFEAT
The SOLFEAT command lets you copy an edge or face of a solid object. 
You can use this command to help create 2D drawings from 3D solid models.

The SOLFEAT command creates a new entity in your AutoCAD drawing from 
the face or edge of a selected solid. The new entity is an anonymous 
block that the command inserts at the same location in your drawing as 
the face or edge it was created from. The block can contain lines, 
arcs, polylines, and circles.

    Edge/<Face>: 

\
Edge Option

This option creates a block by copying the geometry of an edge of a 
solid object.

    Select an edge ... 

Select the edge of an existing solid in your drawing. You can select 
only one edge at a time.

\
<Face> Option

This option creates a block by copying the geometry of a face of a 
solid object. You can select this option by pressing RETURN or entering 
the word face. You cannot automatically select this option by picking 
an object.

    Select a face ... 

Select the face of a solid object. If you pick an object on an edge 
bounding two faces, you see the prompt: 

    <OK>/Next:

When you pick a face by one of its visible edges, you sometimes need 
to clarify which of the two faces sharing an edge is to be used. If the 
face you want is highlighted, press RETURN to accept it; otherwise, 
enter next and then RETURN. 

\
Note: The new entity is positioned directly on top of the selected 
face or edge and remains highlighted while in the SOLFEAT command. 
After exiting SOLFEAT, it is easiest to select the new entity using 
the Last option available in most AutoCAD commands. 

\SOLFILL
The SOLFILL command creates a solid primitive called a fillet and 
automatically unions or subtracts it from the selected solid. SOLFILL 
lets you round the concave and convex edges of an existing solid.

The fillet primitive that this command creates is automatically added 
to or subtracted from the selected existing solid by the SOLUNION or 
SOLSUB Boolean operations.

The SOLFILL command lets you select multiple edges across several solid 
objects. Then you define the size of the fillet by entering its diameter 
or radius. Entering the command produces this prompt: 

    Select edges to be filleted (Press ENTER when done): 

Pick the edges of the highlighted surface you want to fillet. After you 
have selected the edges you want, press RETURN. 

    Diameter/<Radius> of fillet <size>: 

\
Diameter Option

This option defines the diameter of the fillet by entering a positive 
nonzero value or by locating two points.

<Radius> Option

You automatically select this option by entering a positive nonzero 
value or by locating two points to define the radius of the fillet. 
You can use the default value shown by pressing RETURN.

\SOLHANGLE

SOLHAngle (or HAngle)

This variable sets the angle of the hatch pattern used to crosshatch 
sections created with the SOLSECT command. The angle is relative to 
the current UCS. The value of this variable has the same effect as the 
Scale option of the AutoCAD HATCH command.

    Hatch angle <0.000000>: 

Enter a valid hatch angle. See the AutoCAD Reference Manual for 
information on the HATCH command.

\SOLHPAT

SOLHpat (or Hpat) 

This variable defines the hatch pattern used to crosshatch sections 
created with the SOLSECT command.

    Hatch pattern <NONE>: 

Enter a valid AutoCAD hatch pattern name. See the AutoCAD Reference 
Manual for information on the HATCH command.

\SOLHSIZE

SOLHSize (or HSize)

This variable sets the scale of the hatch pattern used to crosshatch 
sections created with the SOLSECT command. The value of this variable 
has the same effect as the Scale option of the AutoCAD HATCH command.

    Hatch size <1.000000>: 

Enter a valid hatch scale. See the AutoCAD Reference Manual for 
information on the HATCH command.

\SOLIDIFY
The SOLIDIFY command converts certain AutoCAD objects into solid 
objects by extruding them to the value of their thickness. 

You can solidify only Polyline, Polygon, Circle, Ellipse, Trace, Donut, 
and Solid entities with a nonzero thickness. You cannot solidify 
Lines, 3D Lines, 3D Faces, or 3D Polys.  A negative thickness value 
creates a solid in the negative extrusion direction. If the selected 
Polyline also has width, the command ignores the width and makes the 
extrusion from the center of the Polyline path.

The Polyline must contain at least two line segments (three vertices). 
If the selected Polyline is not closed, the command creates the 
extruded solid as if the Polyline were closed by a line. Polylines 
with crossing or intersecting segments cannot be extruded.

    Select objects:

Pick the objects you want to solidify. After you select the objects you 
want, the evaluation process begins. 

\
The SOLDELENT variable controls whether the selected objects are deleted
or retained in your drawing after they are solidified. You can set this 
variable so that the objects are always retained, automatically deleted, or 
so that you are asked which. The startup setting is to delete the objects. 
See the SOLVAR command for more information.

By setting the SOLSOLIDIFY variable, you can have solid commands 
automatically solidify two-dimensional objects when they are 
encountered. See the SOLVAR command for more information.

\SOLIN
The SOLIN command imports external assembly files into your current 
drawing. You create an assembly file with the SOLOUT command that 
contains the solid objects of the drawing it was created from. 
Assembly files can also be used from the AutoSolid program (version 
3.1).

    File name <name>: 

Enter the name of the assembly file you want to import. The command 
places the imported solids in your drawing relative to the drawing 
origin.

Important: The main purpose of the SOLIN and SOLOUT commands is to 
provide compatibility with the AutoSolid program (the predecessor to 
AutoCAD AME). We recommend that you use the AutoCAD BLOCK and INSERT 
commands to store and retrieve common symbols. Use the AutoCAD SAVE 
and END commands to save drawings containing solid models.

\
Warning: The SOLOUT command creates an assembly file whose format is 
compatible with AutoSolid (version 3.1); it does not support all of 
the solid-modeling features of AutoCAD AME. Tapered extrusions, 
elliptical cones and cylinders, and some types of fillets and chamfers 
are not supported in this file format.

\SOLINT
This Boolean operation creates a new composite solid comprised of the 
common volume of two or more existing solid objects.

    Select objects: 

Pick the solid objects you want to intersect. A single new composite 
solid is created that is the intersection of the selected objects.

Null solid (i.e. a solid with no volume ) gets created when the 
intersection of selected solids have no common volume. A message is 
displayed in case of null solid creation.

\SOLLENGTH

SOLLength (or Length) 

This variable sets the unit of measure for the length of solid objects.

    Length units <current unit>: 

Enter a unit of length. You can find the available units of length in 
the acad.unt file.

    Change area and volume units also <N> ? 

Answer "yes" if you want the SOLAREAU and SOLVOLUME variables set to the 
same units.

For more information, see the SOLLIST or SOLMASSP commands.

\SOLLIST
The SOLLIST command displays the definition information of a solid 
object, its CSG tree, or a selected edge or surface.

    Edge/Face/Tree/<Solid>: 

Enter the option that displays the information you want.

Note:
The SOLPAGELEN variable controls the number of lines displayed on a 
page before a pause occurs in the scrolling. The AMElite software 
does not let you list the edge or face of a solid.

\
Edge Option

This option displays information about the edge of a solid object.

    Select an edge: 

Pick the edge of a solid object. Be sure to pick the proper member of 
the solid model to get the results you want. This is the information 
displayed for each edge type: 

    Edge type             Information displayed

    Linear (straight)     Endpoint coordinates and length 
    Circular              Center point, radius, and length 
    Elliptical            Center point, major axis, minor axis, and length
    Parabolic             Length 
    Other                 Length

\
Face Option 

This option displays information about the face of a solid object.

    Select a face: 

Select the face of a solid object by selecting one of its visible 
edges. Except for the tessellation lines of toroidal, spherical, and 
conical surfaces, edges are always shared by two faces. Selecting such 
an edge displays this prompt: 

    <OK>/Next:

You need to clarify which of two faces sharing the edge is to be used. 
If the face you want is highlighted, press RETURN to accept it; 
otherwise, enter "next" and then RETURN. 

\
This is the information displayed for each edge type: 

    Surface type                Information displayed

    Planar                      Direction of outward normal vector 
    Cylindrical                 Radius and axis direction 
    Cylindrical (elliptical)    Major and minor radius, and axis direction
    Conical                     Radius/height ratio and axis direction 
    Conical (elliptical)        Major and minor radius/height ratio, and
                                axis direction 
    Spherical                   Center point and radius of sphere 
    Toroidal                    Center point and radius of torus and tube

\
Tree Option 

This option displays the definition of a solid model's CSG tree.

    Select objects: 

Pick the solid objects whose CSG tree information you want to display.

\
Example of a single composite solid of a cone subtracted from a box.
See the printout explanation provided with the Solid option.

    Solid type = SUBTRACTION Handle = 2CB     
        Component handles: 287 and 2A3     
        Area not computed  Material = MILD_STEEL
        Representation = WIREFRAME  Shade type = CSG

    .... Solid type = BOX (3.000000, 4.000000, 2.000000) Handle = 287 
    ....   Area not computed   Material = MILD_STEEL 
    ....   Representation = WIREFRAME   Shade type = CSG 
    ....   Node level = 1 

    .... Solid type = CONE (0.500000, 0.500000, 4.000000) Handle = 2A3
    ....   Area not computed   Material = MILD_STEEL 
    ....   Representation = WIREFRAME   Shade type = CSG 
    ....   Node level = 1

\
<Solid> Option 

This option displays information about only the top level of an 
object's CSG tree. 

    Select solid: 

Pick the solid objects you want to know about. You can select multiple 
objects in a single use of the command. The information for each solid
is printed out in the order you pick the objects. Only information for 
the top level of each object's CSG tree is displayed.

\
This example shows the printout of a single composite solid that is 
the subtraction of a cylinder from a box (the same object as in the 
previous example).

    Solid type = SUBTRACTION Handle = 2CB
        Component handles: 287 and 2A3     
        Area not computed   Material = MILD_STEEL
        Representation = WIREFRAME   Shade type = CSG 

    Rigid motion:   +1.000000 +0.000000 +0.000000 +0.000000     
                    +0.000000 +1.000000 +0.000000 +0.000000
                    +0.000000 +0.000000 +1.000000 +0.000000
                    +0.000000 +0.000000 +0.000000 +1.000000 

Line one shows the solid type. A solid type SUBTRACTION means that the 
SOLSUB command created the highest level of this model's CSG tree. The 
handle of the composite solid is also displayed on this line.

The component handles keep track of the objects on which a Boolean 
operation was performed to create the composite solid. 

\
The area is remembered with the solid as a side effect of the SOLMESH
and SOLAREA commands; matl shows the material assignment of the solid.

The representation indicates the type of wireframe mesh in which the 
solid is currently displayed. The value is either PMESH for SOLMESH or 
WIREFRAME for SOLWIRE. The shade type is the type of shading to be 
performed. The value can be UNIFORM or CSG.

Lastly, the rigid motion values are displayed. Rigid motion keeps 
track of the translation, rotation, and scaling that has been applied 
to the object. The first three numbers of column one define the X axis 
direction for rotation. The second and third columns define the Y and 
Z axes similarly. The first three numbers of the fourth column are the 
X, Y, and Z components of the transformation vector. The last number 
in column four is the scale factor. The last number of columns 1, 2, 
and 3 are unused.

\SOLMASS

SOLMASs (or MASs)

This variable sets the unit of measure for the mass of the solid 
object.

    Mass units <current unit>: 

Enter a unit of mass. You can find the available units of mass in the 
acad.unt file.

For more information, see the SOLMASSP command.

\SOLMASSP
The SOLMASSP command calculates and displays the mass properties of a 
set of selected solids. The mass properties include the mass, center 
of gravity, extents of the enclosing box, moments of inertia, radii of 
gyration, principal moments, and corresponding principal directions. 
Calculations are based on the current UCS. Error estimates are shown 
enclosed in parentheses. 

The centroid of the solid is displayed on your drawing as a point 
entity on the current layer. You can make this point more visible by 
changing the PDMODE and PDSIZE variable. The SOLSUBDIV and SOLDECOMP 
variables affect the accuracy of mass property calculations.

    Select objects: 

Select the objects whose mass properties you want to display.

A prompt at the end of the printout asks if you want to write the mass 
properties to a text file. Answering "yes" displays this prompt:

\

    File name <current drawing name>: 

Enter the name of the file. Choosing the default value saves the 
information in a file with the same name as your AutoCAD drawing 
(except that the text file has the extension .mpr).

\SOLMAT
The SOLMAT command sets the default material of a solid object and 
maintains a list of materials. The command can add new materials to the 
list and change the definition of existing materials. AutoCAD AME uses 
material definitions to calculate properties of a solid object that are 
affected by the object's material.

    Change/Edit/<eXit>/LIst/LOad/New/Remove/SAve/SEt/?: 

Enter one of the above options. 

\
Change Option

This option lets you change the material assigned to a set of existing 
solid objects in your drawing.

    Select objects:

Pick the solid objects whose material you want changed. The command 
can change several objects at once. 

    New material <current material>/?:

Enter the name of the new material you want assigned to the selected 
objects. For a list of the available materials, enter "?". The string 
<current material> contains the name of the default material.

\
Edit Option

This option lets you change the definition of a material. Only 
materials defined in the drawing can be edited. 

    Material name:

Enter the name of a material defined in your drawing. After you enter a 
valid material name, its definition appears in the AutoCAD Text Window. 

    Material (name)
    1. Density, kg/cu_m....................  ####
    2. Young's Modulus, GN/sq_m............  ###.#
    3. Poisson's ratio.....................  .###
    4. Yield strength, MN/sq_m.............  ###
    5. Ultimate strength, MN/sq_m..........  ###
    6. Thermal conductivity................  ###
    7. Linear expansion coeff., alpha/1e6..  ##.#
    8. Specific heat, kJ/(kg deg_C)........  .###

    To edit any of the values, enter its number;
    To confirm and exit, enter 0.
    Item to change or 0 to enter:

\
When you enter the number of the property you want to change, you see
a prompt like this:

    1. Density, kg/cu_m        

Enter the new value for the property. When you are satisfied with all 
the changes to the properties, enter the number zero (0) to 
permanently store them.

    Updating COPPER definition in drawing. 
    Save the material to a file <N> ? 

The definition of the material in your drawing is updated and you are 
given an opportunity to save the definition to an external file. If 
the material is already defined in the external file, you are asked if 
you want to overwrite it.

\
<eXit> Option 

This option quits the SOLMAT command.

LIst Option of SOLMAT

This option displays the definition of a material.

    Material to list <name>/?: 

Enter the name of the material whose properties you want to display. 
The name must be the name of a material that has been previously 
defined in your drawing or the acad.mat file. If the material name is 
not found in your drawing or the acad.mat file, you are prompted to 
enter the name of the external file in which the material can be found.

You can also enter "?" to see a list of available materials. The string 
<name> contains the name of the current default material. The default 
makes no change to the material. After you enter a valid material 
name, its definition appears in the AutoCAD text window.

\

    Material: (name)
    Density:                       ####  kg/cu_m 
    Young's Modulus:               ###.# GN/sq_m 
    Poisson's ratio:               .### 
    Yield strength:                ###   MN/sq_m 
    Ultimate strength:             ###   MN/sq_m 
    Thermal conductivity:          ### 
    Linear expansion coefficient:  ##.#  alpha/1e6 
    Specific heat:                 ###   kJ/(kg deg_C) 

\
LOad Option

This option loads a material definition into your drawing from an 
external file.

    Material name: 

Enter the name of the material you want to load. If the material cannot 
be found in the acad.mat file, you will be prompted: 

    Load material from file <acad>:

Enter the name of the external file that contains the material 
definition you want to load.

\
New Option of SOLMAT

This option defines a new material. 

    Material name: 

Enter the name of the new material. If the material name you enter 
already exists, you see this prompt: 

That material is already defined. If you want to modify its 
definition, use SOLMAT Change.

Otherwise the following prompt appears:

    Material Description: 

You can enter an optional material description to help you remember 
why this material was created, what it is used for, or anything else.

\
After you enter the material description the following lines appear 
one at a time prompting you to enter a value for each. 

    1. Density, kg/cu_m....................
    2. Young's Modulus, GN/sq_m............
    3. Poisson's ratio.....................
    4. Yield strength, MN/sq_m.............
    5. Ultimate strength, MN/sq_m..........
    6. Thermal conductivity................
    7. Linear expansion coeff., alpha/1e6..
    8. Specific heat, kJ/(kg deg_C)........

    To change any of the values, enter its number; 
    to update the changed material, enter 0. 
    Item to change or 0 to enter:

Once you have entered the initial values, the command proceeds like 
the Edit option described earlier.

\
Remove Option

Deletes a material definition from your drawing.

    Material to remove <MILD_STEEL>/?: 

Enter the name of the material definition you want to delete or enter 
"?" to see a list of current material definitions.

\
Save Option

Saves a material definition into an external file from your drawing.

    Material to save <MILD_STEEL>/?: 

Enter the name of the material definition you want to save or enter 
"?" to see a list of current material definitions.

    File name <acad>: 

Enter the name of the file you want the material definition saved in.  
If the material is already defined in the external file, you are asked 
if you want to overwrite it.

\
Set Option

This option sets the material assigned to new solid objects created in 
your drawing.

    New default material <name>/?:

Enter the name of the new default material. The name must be the name 
of a previously defined material. You can also enter "?" to see a list 
of the available materials. The string <name> will contain the name of 
the current default material. The default is to make no change to the 
material.

\
? Option

This option displays a list of the materials currently defined in your 
drawing and an external file. 

    List materials from file <acad>: 

Enter the name of the external file you want to list. 

Here is a sample listing: 

    Defined in drawing:
        GLASS
         MILD_STEEL

    Defined in library:
         ALUMINUM
         BRASS
         COPPER
         GLASS
         LEAD
         MILD_STEEL

\SOLMATCURR

SOLMatcurr (or Matcurr)

This variable displays the name of the default material. The default 
material is the material automatically assigned to newly created solid 
primitives. This is a read-only variable; its value cannot be changed 
with the SOLVAR command. Use the SOLMAT command's Set option to set 
the default material. To see the current default material, use the ? 
option of the SOLVAR command. Entering this option displays a message 
like this:

    Current material is MILD_STEEL (read only) 
    Use the SOLMAT Set command to change SOLMATCURR.

\SOLMESH
The SOLMESH command displays a solid object as a Pface entity (a 
mesh). A mesh approximates the surface of solids by creating multi-
edged faces. 

The SOLWDENS variable controls the mesh density. 

The SOLWIRE and SOLMESH commands are mutually exclusive. This means 
that a solid is represented either as a wireframe or a mesh, but never 
both at the same time. AutoCAD AME remembers the wireframe and mesh 
images of a solid as Block definitions. Even though both the wireframe 
and mesh Blocks can exist for a given solid, only one is displayed at a 
time. The SOLMESH command displays the mesh Block and hides the 
wireframe Block; the SOLWIRE command performs the opposite operation. 

    Select objects: 

Pick the solid objects you want to mesh.

\

Note: Solid objects must be in a mesh representation before you can 
perform hidden-line removal or shading using the AutoCAD HIDE and SHADE 
commands. Because a mesh converts curved surfaces into a series of 
straight edges, you can no longer use object snap. You must use the 
SOLWIRE command to return to a wireframe representation before 
performing arc and circle object snaps.

\SOLMOVE
The SOLMOVE command moves and rotates solid objects based on a motion 
description code.

    Select objects: 

Select the solid objects you want to move or rotate. After selecting 
the objects, an icon appears showing the coordinate system used for 
motion descriptions. 

For explanatory purposes, we will call this temporary coordinate 
system the Motion Coordinate System (MCS). The icon shows the 
orientation of the X axis of the MCS with a single-tipped arrow, the Y 
axis with a double-tipped arrow, and the Z axis with a triple-tipped 
arrow. The origin of the MCS is the point where these arrows converge.

After creating a selection-set, you are prompted to enter the motion 
description.

    <Motion description>/?: 

Enter a motion description code or enter ? to display a list of the 
codes. The motion description is a code allowing you to rotate the 
selected objects, translate (move) them, or redefine the MCS.

\

You can enter several motion description codes at a single prompt by 
separating them with commas. See the examples.

These are the descriptions of the motion description codes: 

ae              Moves the selected objects and the MCS so that the MCS 
                aligns with the edge of a solid object.

                    Select edge to define coordinate system ...

                Select the edge of a solid object. You are allowed to 
                select the edge of one of the currently selected 
                objects.

                When using this motion description, the MCS is linked to
                the selected objects so that when the objects are moved
                or rotated, the MCS is also moved or rotated.

\

af              Moves the selected objects and the MCS so that the MCS 
                aligns with the face of a solid object.

                    Select surface to define coordinate system ...

                Select the face of a solid object by selecting one of 
                its visible edges. Except for the tessellation lines of 
                toroidal, spherical, and conical surfaces, edges are 
                always shared by two faces. Selecting such an edge 
                displays this prompt: 

                    <OK>/Next:

                You need to clarify which of the two faces sharing the 
                edge is to be used. If the face you want is highlighted, 
                press RETURN to accept it; otherwise, enter next and 
                then RETURN. 

                When using this motion description, the MCS is linked to
                the selected objects so that when the objects are 
                moved or rotated, the MCS is also moved or rotated.

\

au              Moves the selected objects and the MCS so that the MCS 
                aligns with the UCS.

aw              Moves the selected objects and the MCS so that the MCS 
                aligns with the WCS.

rx(degrees)     Rotates the selected objects a specified number of degrees
                about the X axis of the MCS. The MCS is not rotated.

ry(degrees)     Rotates the selected objects a specified number of degrees
                about the Y axis of the MCS. The MCS is not rotated.

rz(degrees)     Rotates the selected objects a specified number of degrees
                about the Z axis of the MCS. The MCS is not rotated.

tx(distance)    Translates (moves) the selected objects a specified 
                distance along the X axis of the MCS. The MCS is not moved.

\

ty(distance)    Translates (moves) the selected objects a specified 
                distance along the Y axis of the MCS. The MCS is not moved.

tz(distance)    Translates (moves) the selected objects a specified 
                distance along the Z axis of the MCS. The MCS is not moved.

e               Orients the MCS so that it aligns with the edge of a solid 
                object. The selected objects are not moved or rotated.

                    Select edge to define coordinate system...

                Select the edge of a solid object. The edge can be on 
                one of the selected objects.

\

f               Orients the MCS so that it aligns with the face of a solid 
                object. The selected objects are not moved or rotated.

                    Select surface to define coordinate system ...

                Selects the face of a solid object by selecting one of 
                its visible edges. Except for the tessellation lines of 
                toroidal, spherical, and conical surfaces, edges are 
                always shared by two faces. Selecting such an edge 
                displays this prompt: 

                    <OK>/Next:

                You need to clarify which of the two faces sharing the 
                edge is to be used. If the face you want is highlighted, 
                press RETURN to accept it; otherwise, enter next and 
                then RETURN. 

\

u               Orients the MCS so that it aligns with the UCS. The selected 
                objects are not moved or rotated.

w               Orients the MCS so that it aligns with the WCS. The selected 
                objects are not moved or rotated.

o               Returns the selected objects to their original location 
                and orientation at the start of this use of the SOLMOVE
                command.

Examples

    Motion        Meaning
    description    

    rx45          Rotates a positive 45? about the X axis of the MCS 
    tz-4,rx30     Moves a negative 4 units along the Z axis and rotates 
                  30 degrees about the X axis of the MCS 
    Rz-3.5        Rotates a negative 3.5? about the Z axis of the MCS 
    TY12.25       Moves 12.25 units along the positive Y axis of the MCS 
    tZ-1          Moves 1 unit along the negative Z axis of the MCS

\SOLOUT
The SOLOUT command stores your drawing's solid objects in an external 
assembly file whose format is compatible with the AutoSolid program, 
Version 3.1. 

    File name <name>: 

Enter the name of the file. The command stores assembly files on disk 
and gives them the extension .asm.

Note: The main purpose of the SOLIN and SOLOUT commands is to provide 
compatibility with the AutoSolid program (the predecessor to AutoCAD 
AME). We recommend that you use the AutoCAD BLOCK and INSERT commands 
to store and retrieve common symbols. Use the AutoCAD SAVE and END 
commands to save drawings containing solid models.

Warning: The SOLOUT command creates an assembly file whose format is 
compatible with AutoSolid (version 3.1); it does not support all of 
the solid-modeling features of AutoCAD AME. Tapered extrusions, 
elliptical cones and cylinders, and some types of fillets and chamfers 
are not supported in this file format.

\SOLPAGELEN

SOLPagelen (or Pagelen) 

This variable sets the page length for messages displayed by the 
SOLLIST, SOLMASSP, and SOLMAT commands.

    Length of Text Page (0 - Continuous Scroll) <25>: 

Enter the number of lines displayed on each page. The prompt "Hit 
<Enter> to continue" appears at the end of each page. A value of zero 
scrolls continuously (without paging).

\SOLPROF
The SOLPROF command creates a profile image of solid objects. A 
profile image displays only the edges and silhouettes of curved 
surfaces of the solid for the current view.

You cannot run this command while in TILEMODE. To use this command 
you must first set TILEMODE to zero (off) and switch to model space by 
entering the MSPACE command. If your drawing does not yet contain 
Viewport entities, you will not be able to switch to model space 
before creating a Viewport entity using the MVIEW command.

The command creates the profile image in two parts: the visible-profile 
lines and the hidden-profile lines. Generation of the hidden lines is 
optional. The command creates the two parts of the profile image as 
anonymous Blocks and inserts them at the location of the original solid. 
The new Blocks contain lines, arcs, Polylines, and circles. The visible-
profile Block is drawn in the same linetype as the original solid and 
the hidden-profile Block in the linetype hidden (if available). 
The command places each Block on its own uniquely named layer. The 
following naming convention is used for these layers: 

\

    (solid layer name)-PV-(viewport number)    Visible profile lines 
    (solid layer name)-PH-(viewport number)    Hidden profile lines

If the layers exist, the blocks are added to the information already 
on the layers.

The SOLPROF command does not change the display of layers. If you 
want to view only the profile lines you have created you must use the 
LAYER command to turn off the layer containing the original solid. In 
the example earlier, that would be the layer named SOLIDS.

    Select objects: 

Pick the solid objects you want to profile. The command can profile 
several solid objects at once.

    Display hidden profile lines on separate layer? <N>: 

Enter "yes" or "no" to indicate whether you want to calculate the 
hidden-profile lines. The command creates the hidden profile layer 
regardless of whether you calculate the hidden lines. When more than 
one solid is selected the hidden-line removal is done one solid at 
a time.

\SOLPURGE
The SOLPURGE command lets you conserve memory and reduce your drawing
size. By freeing memory and erasing entities associated with AME solids, the
user can manage system resources.

    Memory/Bfile/Pmesh/<Erased>:

    Each of these options is described next.

    Memory Option of Solpurge

This option releases memory within the AME application that is associated
with AME solids. It does not affect entities (solid or otherwise) in your Auto-
CAD drawing. Solid entities remain in your AutoCAD drawing as a record of
how to rebuild a particular solid.

If an entity representing a solid is selected to participate in an AME command
after being removed from memory, the solid is reconstructed within the AME
application's memory from the information stored within the AutoCAD enti-
ties associated with the solid. AME solids only use memory when they are
selected to participate in an AME command, not when a drawing containing
solids is loaded. Solids will then remain in memory until one of the following
operations occur: the main entity is erased (and the Solpurge Erased command
is entered), the drawing is unloaded, AME is xunloaded, or this option is used.

\

    All/<Select>:

This option releases all memory for all solids currently within AME.

    <Select>

This is the default option; it lets you remove solids from AME memory on a
selective basis.

This option is useful when the user has finished working on a particular solid
in a drawing and wishes to move to another solid in the same drawing. By
releasing the memory associated with the first solid, system performance is
improved for work on other solids.

\

Bfile Option of Solpurge

This option lets you purge Bfile entities from your drawing on a selective
basis.  The main purpose of this option is to reduce the size of your AutoCAD
drawing.

When these entities (and the Pmesh entities described next) are removed, a
50% reduction in drawing size can easily be realized (for a drawing containing
only AME solids.) However, a time penalty will be imposed later if the erased
entities are needed. It is not required that the solid be in AME memory to per-
form these options, although it can be. The solid containing the bfile entity
is not removed from memory when the bfile entity is removed from the drawing.

    Select objects:

Select the solid objects whose Bfile entities you want deleted.

The next time you select the solid to participate in an AME command, the Bfile
will be reevaluated and new secondary bfile entities will be inserted into the
drawing. This option has little effect on the main entity in the drawing or on
the corresponding solid in AME memory (if it is there). The only effect is that
the main entity's extended entity data is modified to break the link between
the erased Bfile and the solid.

\

Pmesh Option of Solpurge

This option lets you purge Pmesh entities from your drawing on a selective
basis. Other than the type of entities purged from your drawing, the descrip-
tion provided for the Bfile option also applies here.

If you select a solid that is currently in a mesh representation, it is
returned to wire representation before removing the mesh.

    Select objects:

Select the solid objects whose Pmesh entities you want deleted.

\

    <Erased> Option of Solpurge

This option is useful for erasing secondary entities associated with an erased
AME solid.

When you erase an AME solid, only the main Block insertion entity is actually
erased. The secondary entities used to store the solid's bfile, background rep-
resentation, and component entities are not automatically erased from your
AutoCAD drawing. Entering this option after erasing an AME solid finds these
secondary entities and erases them.

A garbage collection routine is also automatically executed to free memory
associated with AME solids that have been erased in a previous AutoCAD edit
session.

This option can be time consuming, depending on the number of entities
within the drawing.

\SOLRENDER

SOLRender (or Render) 

This variable determines the color of shading performed by the AutoCAD 
SHADE command, meshes displayed by the SOLMESH command, and wireframes 
displayed by the SOLWIRE command.

    CSG/<Uniform>:

Enter "csg" or "uniform". CSG displays a composite solid in many colors 
based on the color assigned to each primitive that is a member of the 
solid. Uniform displays the solid in a single color, the color of the 
composite solid (the top level of the solid's CSG tree).

\SOLREV
The SOLREV command creates unique solid primitives by sweeping 
(revolving) a Polyline about an axis. 

You can revolve only Polyline, Polygon, Circle, Ellipse, and 3D Poly 
objects. If the selected Polyline has width, the command ignores the 
width and makes the revolution from the center of the Polyline path. 

The Polyline must contain at least two line segments (three vertices). 
If the selected Polyline is not closed, the command creates the 
extruded solid as if the Polyline were closed by a line. Polylines 
with crossing or intersecting segments cannot be extruded.

    Select path polyline or circle for revolution... 
    Select objects:

Pick the object that you want to revolve. The command can revolve only 
one object at a time.

\
The SOLDELENT variable controls whether the selected objects are deleted
or retained in your drawing after they are revolved. You can set this 
variable so that the objects are always retained, automatically deleted, or 
so that you are asked which. The startup setting is to delete the objects. 
See the SOLVAR command for more information.

    Axis of revolution - Entity/X/Y/<Start point of axis>:

The axis of revolution can be defined one of several ways as the 
following options describe.

\
Entity Option

A prompt asks you to pick an existing line or single-segment Polyline 
to define the axis that the path Polyline will be revolved about.

    Entity to revolve about:

The closest endpoint of this line becomes the origin of the axis that 
determines the positive direction of rotation based on the right-hand 
rule. 

    Included angle <full circle>:

Enter a positive value for the number of degrees you want to revolve 
the selected Polyline.

\
X Option

This option uses the positive X axis of the current UCS as the axis of 
revolution.   

    Included angle <full circle>:

Enter a positive value for the number of degrees you want to revolve
the selected Polyline.

\
Y Option

This option uses the positive Y axis of the current UCS as the axis of 
revolution.   

    Included angle <full circle>:

Enter a positive value for the number of degrees you want to revolve
the selected Polyline.

\
<Start point of axis> Option

You automatically select this option if you locate a point on your 
drawing. The start point, the origin of the axis, determines the 
positive direction of rotation based on the right-hand rule.

    End point of axis: 

Locate a point to define the endpoint of the axis of revolution.

    Included angle <full circle>:

Enter a positive value for the number of degrees you want to revolve
the selected Polyline.

Important:  A revolution cannot be performed if the path Polyline and 
the axis of revolution are crossing. However, they are allowed to touch.

\SOLSECT
The SOLSECT command lets you create a new entity that is the cross section
of a solid object. You can use this command to help create 2D drawings from 
3D solid models.

The SOLSECT command calculates the cross section as the intersection 
of the construction plane (the XY plane of the current UCS) and the 
solid objects you select. Therefore to get the cross section you want, 
you must position the UCS before running this command. The new entity 
is an anonymous Block that the command inserts at the location of the 
cross section. The Block can contain lines, arcs, Polylines, and 
circles. If several solids are selected for sectioning, a separate 
Block is created for each solid.

\

You can have the cross section automatically crosshatched by setting 
the SOLHPAT variable to a valid hatch pattern name. The SOLHANGLE and 
SOLHSIZE variables control the angle and size of the hatch pattern. If 
several solids are selected for sectioning, each resulting section is 
hatched separately. See the SOLVAR command for more information on 
these variables.

    Select objects: 

Select the solid objects whose cross section you want. The command 
creates a separate Block for each solid object you select.

\SOLSERVMSG

SOLSErvmsg (or SERVmsg)

This variable sets the level of message reporting displayed on the 
command line. The messages display errors and the status of 
computations in progress in the Advanced Modeling Extension software.

0 = None, 1 = Errors only, 2 = Errors and start/end of computation 
messages, 3 = All Solid Server message display level (0 to 3) <3>: 

Enter a number from 0 through 3. Zero (0) means that no AME messages 
or errors are reported; 1, that only errors are reported; 2, that errors 
and the start and end of computation messages are reported; and 3, that 
all errors and messages are reported.

\SOLSEP
The SOLSEP command separates (takes apart) composite solids created by 
the Boolean operations SOLINT, SOLSUB, and SOLUNION.

Each use of this command undoes (in reverse order) the Boolean 
commands that created a composite solid. In other words, it breaks 
down the CSG tree of a composite solid. 

In some cases the CSG tree is broken down more than one level. For 
example, a single SOLUNION operation on four solid objects creates a 
composite solid whose CSG tree contains two additional levels above 
that of the objects themselves. Separating this solid eliminates both 
of the additional levels of the CSG tree because a single use of the 
SOLUNION command created them. Objects made up of multiple Boolean 
operations require multiple uses of the SOLSEP command to break them
down (there is no SOLSEP All command).

    Select objects: 

Pick the composite solids you want to separate. The command can separate 
several composite solids at once. 

\SOLSOLIDIFY

SOLSOLidify (or SOlidify) 

This variable determines whether 2D objects encountered by solid-modeling 
commands should be converted into solid objects. Only specific 2D objects 
that have thickness can be solidified. See the SOLIDIFY command for more 
information.

    Solidify entity (1 - never, 2 - ask, 3 - always) <2>: 

Enter an integer from 1 through 3. Enter "1" if you don't want 2D 
objects solidified and don't want to be asked. Enter "2" to be asked 
about solidifying 2D objects; the default answer to this question is 
no. Enter "3" if you want objects to be solidified automatically (if 
possible) and don't want to be asked.

\SOLSPHERE
The SOLSPHERE command lets you create a three-dimensional body in 
which all surface points are equidistant from the center. You supply 
only one dimension, the radius or diameter, to define a sphere. The 
wireframe representation of the sphere is positioned so that its 
central axis is coincident with the Z axis of the current UCS.

The SOLSPHERE prompts let you define a two-dimensional circle that is 
revolved 180 degrees about its diameter to form a sphere.

    Center point:

Locate the center point of the sphere.

    Diameter/<Radius>:

The Diameter and <Radius> options are described next.

\
Diameter Option

You create the sphere by defining its diameter.

    Diameter: 

Define the diameter of the sphere by entering a positive nonzero value 
or by locating a point.

\
<Radius> Option

You select this option by locating a point or by entering a positive 
nonzero value for the sphere's radius.

\SOLSUB
This Boolean operation creates a new composite solid by subtracting 
the volume of one set of solid objects from another set.

    Source objects ... 
    Select objects: 

Select the source objects from which other solids will be subtracted. 
The selected objects are automatically unioned to prepare them for 
having other objects subtracted from them.

    Objects to subtract from them ... 
    Select objects: 

Select the objects you want to subtract from the source set. The Boolean 
operation SOLUNION is performed on the selected objects and then the 
operation SOLSUB subtracts them from the source set. A single new 
composite solid is created as a result of the subtraction.

If you accidentally include the source objects in the set of objects 
that are being subtracted from them, the source objects are ignored 
and the command proceeds normally.

\SOLSUBDIV

SOLSUbdiv (or SUbdiv) 

This variable sets the subdivision level for mass properties 
calculation.

    Mass properties subdivision level (1 to 8) <3>: 

Enter a number from 1 through 8. A higher number increases the 
accuracy of the calculation but also increases the computation time. 

For more information, see the SOLMASSP command.

\SOLTORUS
The SOLTORUS command lets you create a solid with a donut-like shape. 
You must enter two radius values to define a torus; one for the tube 
and one from the center of the torus to the center of the tube. The 
torus is created lying parallel to and bisected by the XY plane of the 
current UCS.

Self-intersecting tori are allowed. A self-intersecting torus is one 
with no center hole, as a result of the radius of the tube being 
greater than the radius of the torus. A negative torus radius would 
create a football-shaped solid.

    Center of torus:

Locate the center of the torus.

    Diameter/<Radius> of torus:

The Diameter and <Radius> options are described next.

\
Diameter Option

This option creates the torus by defining its diameter.

    Diameter: 

Define the torus diameter by locating a point or by entering a value. You 
can enter a negative or positive value, but not zero.

    Diameter/<Radius> of tube: 

Diameter

You create the tube of the torus by defining its diameter.

    Diameter: 

Locate a point or enter a positive nonzero value to define the 
diameter of the tube. 

<Radius>

You automatically select this option by locating a point or by entering a 
positive nonzero value to define the tube's radius. 

\
<Radius> Option

You automatically select this option by locating a point or by entering a 
value for the radius of the torus. The torus radius is the distance 
from the center of the torus to the center of the tube. You can enter 
a negative or positive value, but not zero.

    Diameter/<Radius> of tube: 

Diameter

You create the tube of the torus by defining its diameter.

Diameter: 

Locate a point or enter a positive nonzero value to define the 
diameter of the tube. 

<Radius>

You automatically select this option by locating a point or by entering a 
positive nonzero value to define the tube's radius. 

\
Note:

The torus radius can be a negative number as long as the tube 
radius is a positive number of greater magnitude (i.e., if the torus 
radius is -2.0, the tube radius must be greater than +2.0). This is to 
eliminate the possibility of creating a null solid (a solid object of 
no volume).

\SOLUCS
The SOLUCS command aligns the UCS with the face or edge of an existing 
solid object.

    Edge/<Face>: 

Edge Option

This option aligns the UCS with the edge of a solid.

    Select an edge ... 

Selects the edge of an existing solid in your drawing. 

\
<Face> Option

This option aligns the UCS to the face of a solid object. You select 
<Face> by pressing RETURN or entering any portion of the word face. You 
cannot select this option by picking an object.

    Select a face... 

Select the face of a solid object by selecting one of its visible 
edges. Except for the tessellation lines of toroidal, spherical, and 
conical surfaces, edges are always shared by two faces. Selecting such 
an edge displays this prompt: 

    <OK>/Next:

You need to clarify which of the two faces sharing the edge is to be
used. If the face you want is highlighted, press RETURN to accept it; 
otherwise, enter next and then RETURN. 


\SOLUNION
This Boolean operation joins two or more solid objects together to 
form a new composite solid. The resulting solid encloses the volume 
enclosed by each of the solids participating in the Boolean operation. 
It is possible to join solids that do not share any common volume.

    Select objects: 

Pick the solid objects you want joined together. The resulting 
composite solid is the composite of the selected objects.

\SOLVAR
The SOLVAR command lets you set variables that control the solid-modeling 
environment. These variables affect the operation of many solid-modeling 
commands. This command is similar to the AutoCAD SETVAR command.

    Variable name or ?: 

Enter the name of the solid variable whose value you want to change, 
or enter ? to see the list of variables. You can abbreviate variable 
names when entering them; the capitalized portion is the minimum that 
you must enter. 

You can also set variables by entering their name at the AutoCAD 
Command: prompt.

? Option

This option displays a list of the solid variables like the example 
shown here.

\SOLVOLUME

SOLVolume (or Volume)

This variable sets the unit of measure for volume calculations.

    Volume units <current unit>: 

Enter a unit of volume. You can find the available units of volume in 
the acad.unt file. 

For more information, see the SOLMASSP command.

\SOLWDENS

SOLWdens (or Wdens)

This variable sets the density of wireframe and mesh representations 
for newly created solid objects.

    Wireframe mesh density (1 to 8) <4>: 

Enter an integer from 1 through 8. A higher value increases the 
accuracy of the mesh and the time to calculate it.

\SOLWEDGE
The SOLWEDGE command creates a wedge, which is like a box that has been 
cut in half diagonally along one face. The base of the wedge is always 
drawn parallel to the current UCS with the sloped face tapering along 
the X axis. You must supply the same dimensions as when defining a box. 
With the exception of the Cube option, the prompts are the same as those 
of the Solbox command.

    First corner: 

Locate the corner point of the wedge. If your viewing plane is 
parallel to the current UCS, a rectangle rubber bands (stretches
and contracts) from this point to help you visualize the size of
the wedge's base rectangle. 

    Length/<Opposite corner>: 

\
Length Option

The Length option creates a wedge by defining its length, width, and 
height. The length, width, and height are coincident with the X, Y, 
and Z axes of the current UCS, respectively.

    Length:

    Width:

    Height:

You can define the length, width, or height by entering a nonzero 
value or by locating two points.

\
<Other corner> Option

The <Other corner> option lets you create a wedge by either locating 
its diagonally opposite corners or the opposite corners of its base 
rectangle and then its height. After locating a point for the opposite 
corner, you are prompted to enter the wedge's height. If the <Other 
corner> point has the same Z value in the current UCS as the first 
corner point, you see this prompt: 

    Height: 

Otherwise, you see this prompt: 

    Height <height>: 

In either case, you define the height by entering a nonzero value or by
locating two points. In the later example, you can accept the default 
height by pressing RETURN. 

\SOLWIRE
The SOLWIRE command displays a solid object as a wireframe. A 
wireframe approximates solids by displaying the edges of faces and the 
tessellation lines of curved surfaces. 

The SOLWDENS variable controls the number of tessellation lines 
displayed on curved surfaces. 

The SOLWIRE and SOLMESH commands are mutually exclusive. This means 
that a solid is represented either as a wireframe or a mesh, but never 
both at the same time. The SOLMESH command displays the mesh Block and 
hides the wireframe Block; the SOLWIRE command performs the opposite 
operation.

    Select objects: 

Pick the solid objects you want to represent as wireframes.

Note: Solid objects must be in a mesh representation before you can 
perform hidden-line removal or shading using the AutoCAD HIDE and 
SHADE commands. See the SOLMESH command.

