How can I add and draw shapes?
To add shapes such as circles, squares, rectangles and ovals as well as to draw free-form shapes the a pencil tool - click on the Shapes Button in the top Option Menu bar above the drawing canvas.
To draw a circle, square or elipse, click on the shape in the left hand menu panel - you'll know you've selected the shape you want when the button looks depressed. Then move the mouse to the location on the canvas where you'd like the shape, hold down the mouse button and drag the cursor to draw the shape. You can adjust the size and shape of the object by dragging one of the handles on the corners or sides of the shape.