Saving
Screen Motion saves your edits automatically, a moment after each change. Press ⌘S to save straight away; a Saved check appears beside the project's name.
Undo and redo
Press ⌘Z to undo and ⇧⌘Z to redo, or use the arrows at the top of the editor. A whole slider drag undoes in one step.
Renaming
Click the project's name at the top of the editor and type a new one.