Press buttons to change things. You can drag things in the bottom left corner as well. If you press space, you can change the color of the paintbrush. The up and down arrows change it's size. Press C to clear.
Please, make suggestions for more things to add in the comments! Also, if you comment, you can get a surprise if I'm not following you yet. :) UPDATES-- 5/13/2017 -Added the paintbrush tool thing
