Creating and editing animations
You use the Animation palette, in conjunction with the Layers palette and Web Content palette, to create animation frames from an original, multilayer image. Basically, you turn layers on and off per each animation frame to animate the data on those layers. You can assign a delay time to each frame, use the Tween command to generate new frames, and specify looping for the animation. The number of frames you can create is limited only by the amount of memory available to ImageReady on your system.
Slice with animation frames in the Over state