Nikon Z 9 Reference Manual page 474

Custom Settings menu option
d1 [Continuous shooting speed]
[Continuous high-speed]
[Continuous low-speed]
d2 [Maximum shots per burst]
d3 [Limit release mode selection]
[Single frame]
[Continuous L]
[Continuous H]
[C30]
[C120]
[Self-timer]
d4 [Sync. release mode options]
d5 [Extended shutter speeds (M)]
d6 [Limit selectable image area]
[FX (36×24)]
[DX (24×16)]
[1:1 (24×24)]
[16:9 (36×20)]
d7 [File number sequence]
d8 [View mode (photo Lv)]
d9 [Starlight view (photo Lv)]
Defaults
474
Default
20 fps
5 fps
∞
L (cannot be deselected)
M
M
M
M
M
Sync
OFF
L (cannot be deselected)
M
M
M
On
Show effects of settings
OFF