Nikon D780 DSLR Camera (Body Only) - Manual (Page 317)

271 Options for Movie Recording and Editing
Movies can be edited using the following options:
Editing Movies
Option Description
9
[ Choose start/
end point ]
Create a copy from which unwanted footage
has been removed.
4
[ Save current
frame ]
Save a selected frame as a JPEG still.
r [ Add index ]
Add indices to movies during playback. Indices
can be used to quickly locate frames during
playback and editing (
0 277).
o [ Delete index ] Delete indices from movies ( 0 277).