To draw the polygon, drag the pointer and click at each corner, and then double-click when done.
To use only 45- and 90-degree angles, hold down SHIFT while dragging.
Notes
The default background and foreground colors appear at the left in the color box. You can draw with the foreground color by clicking, or you can draw with the background color by right-clicking.
You can undo any number of changes by clicking the Edit menu and then clicking Undo for each change.
You can create a colored fill by clicking a fill style at the bottom of the toolbox.