Click the buttons to do something. - Press [1-3] to change tools: [1] Pen tool (The save code will be longer if you use this.) [2] Line tool [3] Rectangle tool - Press [U] key to undo. (You can still undo after loading a drawing but you can't redo once you undo.) - Press [M] key to mute. - Press [H] key to hide or show the buttons.
