Editing overview
If a photo isn’t perfect, you can fix it in iPhoto. For example, you can…

Compare two or more photos
If you have two similar photos, you can compare them side by side to see…

Duplicate a photo
If you want to create different versions of a photo, you can duplicate it (make…

Save or undo changes you make to a photo
iPhoto automatically saves changes to photos, albums, slideshows, and projects (books, cards, and calendars) as…