ARR/WIT (arrows or witness line) allows you to create 
arrows and witness lines using one of four methods. Unlike
dimension entities, these entities are not associated with
text, but are used when you create dimensions or labels
using separate text, arrow, and witness line entities.

If you create arrow or witness lines in Model Mode and
then enter Drawing Layout Mode, they will not appear. Do
detailing in Drawing Layout Mode.

Choose the type of drafting entity you wish to create,
ARROWS or WITNESS lines.

Choose one of four methods of creation:

ENDPTS  - to create an arrow or witness line by defining
          the start and endpoints.

STRING  - to create a series of arrows or witness lines by
          assuming that the endpoint of one line is the
          starting point of the next.

PARALEL - creates an arrow or witness line parallel to an
          existing line through a specified point.

PERPEND - creates an arrow or witness line from a
          designated point to an existing line entity so 
          that the new witness line and the existing line
          are perpendicular.
