Protect; The Image Selection Screen - Nikon CoolPix S9300 Reference Manual

The Playback Menu
d Protect
Press the c button (Playback mode) M d button (A11) M d Protect
Protect selected pictures from accidental deletion.
In the image selection screen, choose a picture and set or cancel protection. See
"The Image Selection Screen" (E48) for more information.
Note, however, that formatting the camera's internal memory or the memory card
(E78) permanently erases the protected files.
Protected pictures are recognized by the s icon in playback mode (A8).
E47