Please add button for "stop animation", and it would be good if there was a pause/resume animation button (same button), and a separate slow-down and speed-up button aswell, kind of like how media player classic has, were you can incrementally make the animation either slower or faster.
May be like android app OmniGif https://play.google.com/store/apps/deta ... free&hl=en.
Example:
