Nikon Z 9 Reference Manual page 51

Custom Settings menu option
f2 [Custom controls (shooting)]
[Lens Fn button]
[Lens Fn2 button]
[Lens Fn ring (counterclockwise)]
[Lens Fn ring (clockwise)]
[Lens memory set button]
[Lens control ring]
f3 [Custom controls (playback)]
[Fn1 button]
[Fn2 button]
[Fn3 button]
[Fn button for vertical shooting]
[Protect/Fn4 button]
[DISP button]
[Audio button]
[OK button]
[WB button]
[QUAL button]
[Main command dial]
[Frame advance]
[Video playback]
[Vertical shooting multi selector]
[Video record button]
[Sub-command dial]
[Frame advance]
[Video playback]
Menu Items and Defaults for "C" Firmware Version 3.00
Default
AE/AF lock
AF-ON
Recall focus position
Recall focus position
Save focus position
(Varies with lens)
None
None
None
None
Protect
Cycle info display
Voice memo
Zoom on/off
Select for upload to
computer
Rating
1 frame
10 frames
Unswitch
None
1 frame
10 s
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