![]() ![]() Some apps have their own versioning system, which keeps previously saved versions of a document you’re working on. Will Time Machine come to your rescue, then? Not on this occasion, as the last automatic backup was made over half an hour ago. But what if you cut several pages, and that was about fifteen minutes ago? You can’t normally undo that far back, and in any case you don’t want to lose all the other changes you’ve made since. No problems, after a few Undos you’re back to where you were. Sometimes you’re working on a document and realise what you did a few moments ago needs to be changed. One of the essential features of any decent operating system is to help us recover from them.
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