Use the Polygon Tools to drawing complex, multi-sided geometric shapes. Clicking the small arrow next to the tool's icon will display a menu containing the sub-tools below:
The thickness of the polygon's border is controlled by the Line Width slider on the Option Panel. The Fill Selector and Color Palette can be used to change the border/line color, interior fill color and the fill method (solid color, gradient, image tile, pattern, etc.).
Holding down the Shift key while drawing polygons will cause line segments to snap to angles in 45° increments. This is helpful when you want to draw perfectly horizontal or vertical lines.