Edit Menu

Previous Step <Ctrl+Z>
Undo <Ctrl+Alt+Z>
Redo <Ctrl+Shift+Z>
Image Rotation
Straighten
Image Size <Ctrl+Alt+I>
Canvas Size <Ctrl+Alt+C>
Cut <Ctrl+X>
Copy <Ctrl+C>
Paste <Ctrl+V>
Clear
Crop
Fill <Shift+F5>
Feather <Shift+F6>
Content-Aware Scale
Remove Background
Eraser <E>
Effect Brush
Filter
Clone <S>