Specifying Coordinates
When specifying points with the pointer, click the first point and move
the pointer to the next point. A preview shows you the placement and size
of the entity. When you are satisfied, click the second point.
To specify coordinates, you can click in the graphics area with the
pointer or type numbers on the command line in the following formats.
Cartesian 2,2 are X,Y coordinates
Polar 5<45 indicates length 5, angle
45 degrees
Relative @2,2 where @ indicates that the
pair is relative to the previous point