Press "C+click and drag" to erase "Space" to change brush, "Q" to clear. Bar on the side tells you what the brush will look like when you paint. Click and drag to draw.
Kinda cheap, I know... If you like it, then click that heart button in the bottom left hand corner! (The one that has a dull dark grey) Didn't put an intro on this one. :P Enjoy! -- @JBGT
