CORNERS allows you to indicate positions for opposite
corners of the rectangle.

Indicate the type of polygon by choosing from the 
following options:


OUTLINE - to assign the active entity color to the polygon
outline. This color must be set before the entity is
created, using the SET option or the COLOR parameter
in the Status Window.

FILLED - to automatically fill-in the polygon with a color
from the color palette supported by your graphics card.
The system sets colors 1-15 for you; colors 16-255 are set
by your card. Select a color from the displayed palette 
or press <Enter>, type the number of the color you want 
and press <Enter> again.


Indicate positions for the corners of the rectangular
polygon using a Position Menu options.

In 2-D construction mode, the reference point is projected
to the current construction plane, and the polygon is
created in the construction plane.

In 3-D construction mode, the polygon is created in the
plane that is parallel to the construction plane and 
passes through the indicated reference position.
