Press and hold C to view the color, but press the up and down arrows to change it. Press and hold B to view the brightness, but press the up and down arrows to change it. Press and hold E & Space to use the eraser. Press and hold space to continuously draw.
If you loaded in something from your last drawing and try to reload it, it does NOT load in the stuff that has all ready been loaded in. Maybe try painting over it again. It will ask you if you want to load in a past drawing from the SAME visit, ONLY if actually have one. - I did this all on my own with a little of help for the grid snap. https://www.youtube.com/watch?v=-aOTehpu0ag
