Nikon D780 DSLR Camera (Body Only) - Manual (Page 727)

681 Menu Guide > B The Setup Menu
Add a comment to new photographs as they are taken.
Comments can be viewed as metadata in ViewNX-i or
Capture NX-D.
Input Comment
Input a comment of up to 36 characters. Highlight [ Input
comment ] and press 2 to display a text-entry dialog. For
information on text entry, see “Text Entry” ( 0 61).
Attach Comment
To attach the comment to subsequent
photographs, highlight [
Attach
comment ], press 2 , and confirm that a
check ( M ) appears in the adjacent check
box. Press J to save changes and exit;
the comment will be attached to all
subsequent photographs.
D Photo Info
Comments can be viewed on the shooting data page in the photo
information display.
Image Comment
G button
U B setup menu