7
A SENSE OF HISTORY
A true test of how powerful a computer application is lies not in the ability to “do,” but rather to “undo.” Having the ability to create with a safety net is a liberating experience. By harnessing the power of the History palette, an editor or designer can manage to try new things without having the pressure of a missed deadline.
Configuring History States
By default, Photoshop has 20 history states. A history state is simply a level of undo. If 20 is not enough for you, then you can increase this number. To do so, activate Photoshop’s Preferences by pressing 
. In Photoshop CS3 you’ll find History States under the Performance ...
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