To draw rectangles and squares:

1. Click and hold on the shape tool  and select the rectangle subtool
2. Click down on the artboard and drag out to create the desired size of the shape
3. For squares, hold the SHIFT key while forming the shape to constrain its proportions

To draw ellipses (ovals) and circles:

1. Click and hold on the shape tool  and select the ellipse subtool 
2. Click down on the artboard and drag out to create the desired size of the shape
3. For perfect circles, hold the SHIFT key while forming the shape to constrain its proportions

To draw polygons (triangles, pentagons, octagons, etc.):

1. Click and hold on the shape tool  and select the polygon subtool 
2. Click down one time on the artboard
3. Enter the amount of sides in the dialog box. (You can enter the size as well, but you can always scale your object later.)

–OR–

1. Click and hold on the shape tool  and select the polygon subtool 
2. Click down on the artboard and drag out to create the desired size of the shape
3. Add the SHIFT key to make the shape straight. (Note: the number of sides created will be whatever polygon you last created. To change, follow the first set of steps above.)

To draw stars, bursts, and seals:

1. Click and hold on the shape tool  and select the star subtool 
2. Click down one time on the artboard
3. Enter the amount of points, and the radius between the outer and inner points in the dialog box
   (The closer these two numbers are = less pointy appearance perfect for seals. The further apart these two numbers are = more pointy appearance perfect for bursts. Play around with your settings to create perfect stars!)

For best results, I encourage you to watch the short quick tip video above as many times as you need.