Nikon D40x 사용자 설명서

In full-frame, zoom, and thumbnail playback, the 

 button can be used to protect photo-

graphs from accidental deletion.  Protected files can not be deleted using the   button or
the Delete option in the playback menu, and have DOS “read-only” status when viewed on
a Windows computer.  Note that protected files will be deleted when the memory card is
formatted (  13, 81).

Press the 

 button to protect the photograph currently dis-

played in full-frame or zoom playback or highlighted in the
thumbnail list.  The photograph will be marked with a 

 icon.

To remove protection from the photograph so that it can be deleted, press the 

 button

when  the  photograph  is  displayed  in  full-frame  or  zoom  playback  or  highlighted  in  the
thumbnail list.

Press the   button to delete the photograph currently displayed
in full-frame or zoom playback or highlighted in the thumbnail list.
One of the following confirmation dialogs will be displayed; press
the   button again to delete the photograph.  Press the   button
to exit without deleting the photograph.

This option can be used to delete multiple photographs.