As I described in my video tutorial Glamour Retouching Workflow, I use the patch tool to remove most skin blemishes. I encounter the need to do multiple Undos most often when I am doing skin retouching. You can step back as far as the first item in your history panel. This command, which is available in the Edit menu, will step backwards in the History Panel, and is basically a multilevel Undo. The function that I want Ctrl-Z to perform is called “Step Backward” in Photoshop terms. So here is how I modify Photoshop to make Ctrl-Z behave the way it should. In Photoshop the keyboard shortcut Ctrl-Z is a toggle between Undo and Redo, for all other programs you can Undo multiple steps. One of the things I find most frustrating things about Photoshop is that it’s default behavior for the keyboard shortcut Ctrl-Z (Undo) is unlike every other program on my computer.