Nikon D5 User Manual page 328

f2 Multi selector center button
Shooting mode
Playback mode
Live view
f3 Shutter spd & aperture lock
Shutter speed lock
Aperture lock
f4 Customize command dials
Reverse rotation
Change main/sub
Aperture setting
Menus and playback
Sub-dial frame advance
f5 Multi selector
Restart standby timer
Do nothing
f6 Release button to use dial
Yes
No
U
306
Choose the role played by the center of
the multi selector.
Lock shutter speed at the value currently
selected in mode S or M, or aperture at
the value currently selected in mode A or
M.
Choose the roles played by the main and
sub-command dials.
(defaults to Do nothing)
Choose whether using the multi selector
activates the standby timer (0 41).
Selecting Yes allows adjustments that
are normally made by holding a button
and rotating a command dial to be made
by rotating the command dial after the
button is released. Setting ends when
the button is pressed again, the shutter-
release button is pressed halfway, or the
standby timer expires.
(defaults to No)