Nikon D5100 Guide D’Exploitation

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I
Protecting Photographs from Deletion
In full-frame, zoom, thumbnail, and calendar playback, the 
L button can be used to 
protect photographs from accidental deletion. Protected files can not be deleted 
using the 
O button or the Delete option in the playback menu. Note that protected 
images will be deleted when the memory card is formatted (
0 22).
To protect a photograph:
1
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.
2
Press the 
L (A) 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 
L (A) 
button.
Full-frame playback
Thumbnail playback
Calendar playback
A
Removing Protection from All Images
To remove protection from all images in the folder or folders currently selected in the 
Playback folder menu, press the 
L (A) and O buttons together for about two seconds 
during playback.
L (A) button