How to regain warnings about permanent version storage? With Preview in Mountain Lion, I carelessly checked the box –

[√] Do not show this message again

– imagining that the preference was for just one volume. 

Then realised that the warning (the sheet): 


no longer appears for Preview, with other volumes that do not support permanent version storage
continues to appear for apps other than Preview, with the volume where I don't require the warning. 


In other words, I imagined wrong. The preference may be app-specific, not volume-specific. 

Please: 


how do I regain the warnings in Preview?


Already I sped through ~/Library/Preferences sorted by modification date, and opened a few files including com.apple.finder.plist but at a glance: 


I can't find any .plist with content that includes the string revision


If the preference is elsewhere in com.apple.finder.plist: where? 

(I'd prefer to not abandon that file – it's 35 KB with 3,417 lines.)

Also I viewed the content of recently modified .plist files relating to Preview. Unless I'm missing something, nothing relating to revisions, versions or storage. com.apple.Preview.plist is not recently modified –



– and within those nine, the two that are recently modified seem to contain nothing relating to permanent version storage: 





Any other ideas on how to correct my mistake? – Thanks
For apps that are not sandboxed

Example: 

To regain warnings about permanent version storage for Apple Pages

Quit the app, then a one-line command in Terminal: 

defaults write ~/Library/Preferences/com.apple.Pages NSDocumentSuppressTempVersionStoreWarning -int 0


– in the Preferences area that's familiar to users of Snow Leopard and less. 

For apps that are sandboxed

The operating system uses a different approach to containment of some preferences: 

~/Library/Containers/&lt;bundle_id&gt;/Data/Library/Preferences

Example:

To regain warnings about permanent version storage for Apple Preview

Quit the app, then a one-line command in Terminal: 

defaults write ~/Library/Containers/com.apple.Preview/Data/Library/Preferences/com.apple.Preview NSDocumentSuppressTempVersionStoreWarning -int 0


Thoughts

I should have thought first of ~/Library/Containers when, in the question, I observed –


  com.apple.Preview.plist is not recently modified 


– but I didn't realise what was going on until after I used fseventer to visualise writes for a different user of the OS. 





References

App Sandbox Design Guide: Migrating an App to a Sandbox

A visual record of me finding the relevant key in the .plist for Pages

A visual record of me finding the relevant key in the .plist for Preview