Click once to set an anchor point (or use the space bar), then
move the cursor, and click again. Continue dragging and clicking until
the polygon is complete. Double-click (or use the enter key)
to complete the polyline. Click the right mouse button (or use backspace
key) to remove last point. Polyline drawings with brush
color A or with gradient.
To draw regular polygon enable flag Regular polygon on the
properties panel. If this flag is enabled, the first click will define
the center point of a regular polygon. The slider Count defines
the number of sectors of the polygon. The slider Proportion
allows you to scale the polygon horizontaly (negative value) or verticaly
(positive value).