Nikon L620 - Manual (Page 149)

E 51
Re
fe
re
nce
S
ect
ion
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 (
E52).
Note that formatting the camera’s internal memory or the memory card permanently deletes
protected files (
E72).
Press the c button (playback mode) M d button M Protect M k button