Nikon S5300 - Manual (Page 169)

E 57
Re
fe
re
nc
e
S
e
ct
io
n
Protect
The camera protects selected images from accidental deletion.
Select images to protect or cancel protection for previously protected images from the image
selection screen (
E58).
Note that formatting the camera’s internal memory or the memory card permanently deletes
protected files (
E83).
Press the c button (playback mode) M d button M Protect M k button