Lord Kelvin deserves an apology; the term "degrees," we're told by numerous alert readers, is not used along with his name in describing the temperature of an object. [MHA]
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Use Shift to Compare Edits in iPhoto '08
In iPhoto '08, while you're editing a photo, press the Shift key to see a "before" view; let it up to see the "after" view. It's much faster and easier than using Undo and Redo.