I'd like to have a shortcut bar that sets the size of your brush with a single click. I use the pencil tool a lot and there are really only a couple of sizes I use. Instead of dragging the puck to get an approximate size, it would be better to just click a shortcut. Maybe there could be three or four user definable buttons, which would change depending on the brush selected (the airbrush would probably be larger than the pencil, for example, but wouldn't have to be).