Use
            the Rectangle option to draw rectangles or squares.
         
         To paint a rectangle or square:
         
         
            - Click Geometry to display the Geometry
               menu.
            
- Select Rectangle from the Geometry box.
               The Equal Sides button
                  appears.
                
- To draw a square, enable Equal Sides
               or press and hold P.
            
- Press the cursor on the canvas to anchor
               the first corner of the rectangle. Drag the cursor to size the rectangle.
            
- When the rectangle is the required size,
               release the cursor.
               A brush stroke is painted
                  along the sides of the rectangle.