To draw shapes, click and hold your mouse button on the shape tool in the toolbox on the left hand side. From the slideout menu, select a shape.
From the options along the top of the screen, select the fill colour and the stroke. The stroke is the border colour. Also select the border thickness.
Click and drag the size of the shape you want.
To move the shape, select the move tool from the toolbox, then click and drag the shape into a new position.