Every time you take a screenshot on a Mac, you press Shift+Command+3, Shift+Command+4, or Shift+Command+5. But what happened to Shift+Command+1 and Shift+Command+2? It’s a trivial question, but the answer reaches back into early Mac history. Let’s find out.
Whenever you make a mistake on your Mac, it’s easy to take a step back with Undo. And if you change your mind, you can Redo the last command just as easily in most apps. Here’s how to use them.
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