Press space to erase all. The pencil will draw only when the mouse is down. Press settings to change the pencil colour, brightness etc, and press E to leave the settings and return to the canvas.
I was having a look through all my projects, and deleting any ones I had begun making, but then lost enthusiasm for them. When I came across 'Sketchpad' I wondered if I could upgrade it, so I set to work. It was really simple, with few bugs when I first tried it. Now, I guess it isn't so much a waste of space. I know it's simple, but at least it's usable and worth the time. CHANGELOG Renovation and re-launch-V1.0