Nikon D750 DSLR Camera (Body Only) - Manual (Page 384)

356
Choose the role played by the Fn button,
either by itself ( Press ) or when used in
combination with the command dials
(
Press + command dials ).
❚❚
Press
Selecting Press displays the following options:
f2: Assign Fn Button
G button
➜
A Custom Settings menu
Option Description
q
Preview
During viewfinder photography, you can preview
depth of field while the
Fn button is pressed
( 0 92). During live view photography, you can
press the button once to open the lens to
maximum aperture, making it easier to check
focus; pressing the button again restores
aperture to its original value (
0 56).
r
FV lock
Press the Fn button to lock flash value (built-in
flash and compatible optional flash units only,
0 190, 435). Press again to cancel FV lock.
B
AE/AF lock
Focus and exposure lock while the Fn button is
pressed.
C
AE lock only Exposure locks while the Fn button is pressed.
E
AE lock (Hold)
Exposure locks when the Fn button is pressed,
and remains locked until the button is pressed a
second time or the standby timer expires.
F
AF lock only Focus locks while the Fn button is pressed.
A
AF-ON
Pressing the Fn button initiates autofocus. The
shutter-release button can not be used to focus.
s
Flash off
The flash will not fire in photos taken while the Fn
button is pressed.