Xcode 4 disable snapshots creation on refactoring

I turned on Xcode4's snapsh开发者_C百科ot on replace feature. I want to turn it off. How do I do that?

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File->Project Settings (or File->Workspace Settings if you're in a Workspace), and then click on the 'Snapshots' tab: you want to uncheck the "Create snapshot of project before mass-editing operations" box.

Thanks to Teknogrebo for pointing out in the comments how to do this for workspaces rather than projects.