Rewrite history with the Step commands (Photoshop CS2/CS3/CS4/CS5)

Has this happened to you? You just finished creating a multi-layered Photoshop document, so you flatten the layers and savë it. Then, you look at the document again and realize a word on a text layer is spelled wrong. No worries! We have a shortcut to fix it. As long as you haven’t already closed the document, you can simply press [apple][option]Z ([Ctrl][Alt]Z in Windows) to command Photoshop to step backward and restore your layers for editing. This doesn’t delete the steps, but renders them invisible on the History panel. To redo any steps or to step forward again, just press [apple][shift]Z ([Ctrl][Shift]Z in Windows).