Apple iPhoto Edit keyboard shortcuts keys

Shortcut                                                            Command
Cmnd-R	Rotate photo clockwise
Optn-Cmnd-R or press the Optn key while cli	Rotate photo counter clockwise
Press the Right Arrow key	Go to next photo
Press the Left Arrow key	Go to previous photo
Press the Cmnd key while dragging	Disable constrain setting when selecting an area
Press the Optn key while dragging	Switch between portrait and landscape constrain setting when selecting an area
Double-click the photo	Return to organize view
Cmnd-Z	Undo last action
Shft-Cmnd-Z	Redo last action