Nikon P310 - Manual (Page 179)

E 59
The Playback Menu
Re
fere
nce
S
ect
io
n
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” (
E60) for more information.
Note, however, that formatting the camera’s internal memory or the memory card
(
E81) permanently erases the protected files.
Protected pictures are recognized by the s icon in playback mode (
A8).
Press the c button (Playback mode) M d button (A11) M d Protect