Previous Frame Overlay..... Frame by Frame by Frame by Frame by Frame by

Hello there.

I am trying to create a small animation just as a little bit of fun. I would like to do it frame by frame.

I have a simple question to ask about frame by frame animation.

When drawing frame by frame, you would usually have a transparent overlay that you can compare with the next frame. Is there a way to do this in flash without having to copy the previous keyframe into a new keyframe on a new layer?

Thanks Emdiesse