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I just opened an image in Preview, selected a rectangle, hit delete and then quit Preview. Now I have a grey rectangle missing from the middle of my image but at no point did I get a chance to say whether or not I wanted to save my changes.

Is this normal?

(I made the edit just to have a quick play with Preview, see what it can do. Needless to say I'm not impressed)

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1 Answer 1

Yeah, Preview has supported auto-save since 10.7.

The general preference pane has an option to ask to keep changes when closing documents. It can also be applied to individual applications:

defaults write com.apple.Preview NSCloseAlwaysConfirmsChanges -bool true

You can also disable auto-save and Versions completely:

defaults write com.apple.Preview ApplePersistence -bool false
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1  
Don't have access to a Mac right now, but shouldn't there be a "Revert" command in the File menu as well? –  patrix Oct 17 '12 at 11:34
    
It even has "Revert To" with a submenu showing all versions. –  GEdgar Oct 17 '12 at 13:00
    
System Preferences > General > Ask to keep changes when closing documents –  GEdgar Oct 17 '12 at 13:02

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