Thanks Seth, looks good so far.
I wouldn't know where to start with something like this, so kudos to you for making it. Being able to do something with right click, whether it is a second colour option or an erase would be nice.
Full screen is a little buggy with dual monitors. If I try to full screen on Screen 2, it maximises on Screen 1 only. Not sure if this is just GMS2 related though. Resizing the drawing area will erase all contents outsize of the drawing area, probably intended.
Actually really liking it so far.