Instructions:
1. Click once to set the starting point.
2. Move mouse to see the rectangle outline and distance.
3. Click a second time to extrude into a 3D block.

Instructions:
1. Click once to set the starting point.
2. Move mouse to see the outline and distance.
3. Click once to add an angle to the form.
4. Double click to extrude the custom form into a 3D object.