The RECTANGLE command supports three different options as shown below.

Rectangle options

 RectangleUnderstanding the idiosyncrasies of the rectangle command can help speed drafting. Rectangles drawn in gCADPlus are much more than simple 4 line entities.

Center, size and angle option

This option can be most useful.

Trim  This movie shows how to use the TRIM command on rectangles to create markers on an architectural B size sheet. 

Trim with rectangles