Nikon Df - Manual (Page 283)

263
U
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:
f4: Assign Fn Button
G
button ➜ A Custom Settings menu
Option Description
q Preview Press the Fn button to preview depth of field (0 41).
r FV lock
Press the Fn button to lock flash value (supported
flash units only, 0 118). Press again to cancel FV lock
(0 130).
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.
D
AE lock (Reset
on release)
Exposure locks when the Fn button is pressed, and
remains locked until the button is pressed a second
time, the shutter is released, or the standby timer
expires.
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.
s Flash off
The flash will not fire in photos taken while the Fn
button is pressed.