Use the slider to change the thickness, and click on the dots to change the color. Click on anywhere besides the slider to after you are done, for some reason it keeps thinking that the arrows are changing the slider unless you press somewhere else afterwards. Use "up arrow" to stop the line, and "down arrow" to start a line. Press your "spacebar" to erase the entire thing. Have fun with your magic cross between a paintbrush, marker, and pencil!
I used a lot of the pen extension. The username block is just to be friendlier. Credits go entirely to me, I came up with the entire idea by myself. (I guess that sounds greedy, but it's true.)
