Choose the role played by the Fn button on optional wireless remote controllers equipped with an Fn button. See Custom Setting f1 (Custom control assignment, 0 f1: Custom Control Assignment) for more information.

r FV lock
B AE/AF lock
C AE lock only
D AE lock (Reset on release)
F AF lock only
$ Modeling flash
h Flash off
e + NEF (RAW)
a Live view *
x Same as camera Fn1 button
0 Same as camera Fn2 button
z Same as camera A button

Performs the same function as the camera a button.