Nikon D780 DSLR Camera (Body Only) - Manual (Page 618)

572 Menu Guide > 1 The Movie Shooting Menu
Restore movie shooting menu options to their default values
(
0 516).
Choose the three-letter prefix used in naming the image files in
which movies are stored; the default prefix is “DSC” (
0 550).
Choose the slot to which movies are recorded when two
memory cards are inserted.
• The menu shows the time available on each card.
• Recording ends automatically when no time remains on the
current card.
Reset Movie Shooting Menu
G button
U 1 movie shooting menu
File Naming
G button
U 1 movie shooting menu
Destination
G button
U 1 movie shooting menu