stop-animation

A frame-by-frame animation changes the contents of the Stage in every frame and is best suited to a complex animation in which an image changes in every frame instead of simply moving across the Stage. This type of animation increases the file size more rapidly than tweened animation because Flash stores the values for each keyframe.
To create a frame-by-frame animation, you define each frame as a keyframe and create a different (typically modified) image for each frame. Each new keyframe on a layer typically contains the same contents as the keyframe preceding it because the contents of a frame are copied to the next keyframe when you select a frame and press F6. By selecting a frame and pressing F6, you can modify each new keyframe in the animation incrementally. In Figure 14, you can see that a frame-by-frame animation was used to move a pirate's head very slightly on sequential frames.