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- This is the Main Menu that allows you to use the Function keys to select
- the different options to construct pictures on the graphics screen.
-
- If you start this program on a monochrome display, then the program runs
- in dual screen mode and you have instructions on the monochrome display and
- graphics on the graphics display. If you start this program on the graphics
- display, then the program runs in single screen mode with instructions and
- graphics sharing the same graphics display, and you may need to press the F1
- key to look at some instructions that are not displayed in single screen mode.
-
- Graphic objects can be either text or picture and can be moved on the
- graphics display either by the numeric keypad or a light pen or a joystick. If
- you use the numeric keypad with the SHIFT key or Num Lock key on, then the
- object can be moved 10 times faster. You can change color, scale up or down
- the size of an object by a single keystroke. Objects are written onto a temp-
- orary graph file. When you are at this Main Menu and you press the Esc key to
- end your current session, the program will ask you to rename the temporary
- graph file. Graph files can be retrieved in the future for update, or for
- display on a graphics screen or graphics printer or IBM plotters.
-
- If your previous session ended abnormally, then when you invoke this
- program again, you can optionally continue from where you left off previously.
-
- The options associated with the Function keys on the Main Menu are:
-
- Press the F1 key to display this HELP screen.
- Press the F2 key to PRINT the graphics screen on a graphics printer.
- Press the F3 key to BSAVE the graphics screen on a 16K screen dump file.
- Press the F4 key to get objects from an existing graph FILE.
- Press the F5 key to construct a series of LINES to form a picture.
- Press the F6 key to construct a line of TEXT.
- Press the F7 key to get a predefined graphic SYMBOL.
- Press the F8 key to draw a BOX or an ellipse.
- Press the F9 key to construct geometric figures.
- Press the F10 key to EDIT (i.e. move, copy, delete) objects that have
- already been drawn on the screen.
-
- The best time to modify an object (i.e. change color, size, flip, etc.)
- is when you are moving the object. Once you have written the object onto the
- temporary graph file, the object will remain stationary on the graphics screen
- and to move it or modify it at a later time, you need the F10 EDIT option.
-
- When you are moving an object and you press the Esc key, the object will
- be erased from the graphics screen and will not be written onto the temporary
- graph file.
-