Nikon D810 - C4: Monitor off Delay

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Choose how long the monitor remains
on when no operations are performed
during playback (Playback; defaults to
10 s) and image review (Image review;
defaults to 4 s), when menus (Menus;
defaults to 1 minute) or information
(Information display; defaults to 10 s)
are displayed, or during live view and movie recording (Live
view; defaults to 10 minutes). Choose a shorter monitor-off
delay for longer battery life.
c4: Monitor off Delay
G button ➜ A Custom Settings menu