Just hold down mouse or finger to make boxes, also you can control brightness and color :D! Green Flag = reset! To use the keyframe bar down at the bottom of the screen just click on the frames or drag the black bar. Buttons n' stuff ?! The 2 buttons at the top are onion skinning, and play animation. The 2 slides at the top are color, and brightness. And of course the blue "change anim speed" changes the length (in seconds) of the animation!
