TIP: QuickMask Switch-a-roo

When you're using Quick Mask to make a selection, the area you're painting appears clear, and the masked area appear in a red tint. But having the opposite (where you paint appears in red) can really be helpful in making accurate selections. The tip is this: you can quickly toggle between the two "looks" by holding the Option key (PC: Alt-key), and clicking directly on the Quick Mask icon (as shown in the capture) to toggle back and forth. I duplicated the photo (in the screen capture) so you can see how the two different Quick Mask modes look.