iPhoto ’11: The Macintosh iLife Guide to using iPhoto with OS X Lion and iCloud

Edit View at a Glance

Three Things to Remember When Editing

Before-and-after view. To see how your photo looked before you made any changes, hold down the Shift key. By pressing and releasing Shift, you can see a before-and-after view of all of your edits to the original.

Safety nets: undo and revert. Not happy with your very latest change? Choose Edit > Undo. Not happy with the changes you made since you opened the photo? Choose Photos > Revert to Original, and iPhoto discards your edits and restores the photo to its previous state.

Change your mind? To exit edit view without saving any changes, press the Esc key (if a tool, like the Straighten ...