Using Versions

One huge problem with saving files is that each time you save a file, you wipe out the older version of that same file. Normally this isn’t a problem, but if you write a report, save it, modify it, and save the modifications, you may suddenly realize that you accidentally deleted data that you really need.

One solution is to retrieve a backup copy of your file, rename it, and examine the renamed version along with your new, modified version. Naturally, this is clumsy, so that’s why Lion offers Versions.

The main idea behind Versions is to save different versions of your file automatically. Now if you suddenly need all or part of an older file, you can just view that older version of a file, copy the data you need from that older file, ...

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