Protecting Photographs From Deletion - Nikon D3000 User Manual

In full-frame, zoom, thumbnail, and calendar playback, the o-n button can be used to
protect photographs from accidental deletion. Protected files can not be deleted
using the _ button or the Delete option in the playback menu. Note that protected
images will be deleted when the memory card is formatted (_ 21).
To protect a photograph:
Select an image.
Display the image in full-frame playback or playback zoom or highlight it in the
thumbnail list in thumbnail or calendar playback.
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Full-frame playback
Thumbnail playback
Press the o-n (_:_) button.
The photograph will be marked with a []
icon. To remove protection from the
photograph so that it can be deleted, display
the photograph or highlight it in the
thumbnail list and then press the o-n (_:_)
button.
Calendar playback
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