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Histogram panel

The histogram, that curious mountain range depicting where in the image the tones sit in relation to absolute black and absolute white, is a very handy tool. At a glance, you can tell whether an image is overexposed or underexposed.

History panel

History contains a list of all the steps and mouse clicks that are made while editing an image. Everything is recorded in a linear fashion, so it's entirely possible to go back in time to a previous edit state in order to re-work a specific part of the edit process. It doesn't allow you to combine different states—once a state has been deleted, everything later than that is also lost.

Favorites panel

Store frequently used clip art, filters, effects, and text, by dragging the effect thumbnail into this panel. This is a huge time-saver because everything is in one place for fast access.

Navigator panel

This small panel displays a large thumbnail of the image that's displayed...