Pen Controls: Press 1/2 to change colour. Press 3/4 to change saturation. Press 5/6 to change brightness. Press 7/8 to change transparency. Press 9/0 to change size. Press Space to Stamp and Q/E to cycle stamps and W to return to pencil.
Careful when using big pen sizes as the visualiser may delete some of your work in the top right, so don't make giant pen sizes.
