Nikon Z 9 Reference Manual page 49

Custom Settings menu option
d19 [Custom viewfinder shooting display]
[Display 1]
[Display 2]
[Display 3]
[Display 4]
d20 [High fps viewfinder display]
e1 [Flash sync speed]
e2 [Flash shutter speed]
e3 [Exposure comp. for flash]
[Auto c ISO sensitivity control]
e4
e5 [Modeling flash]
e6 [Auto bracketing (mode M)]
e7 [Bracketing order]
e8 [Flash burst priority]
[Customize i menu]
f1
Prioritize precise flash control
Custom controls (shooting),
Menu Items and Defaults for "C" Firmware Version 3.00
Default
L (cannot be deselected)
M
M
M
OFF
1/200 s
1/60 s
Entire frame
Subject and background
ON
Flash/speed
MTR > under > over
Set Picture Control,
White balance,
Image quality,
Image size,
AF-area mode/subj.
detection,
Focus mode,
Metering,
Vibration reduction,
Shooting menu bank,
Airplane mode,
View memory card info
49