Reset All Settings; Firmware Version - Nikon Z 9 Reference Manual

Reset All Settings

Reset all settings except [Language] and [Time zone and date] to their
default values. Copyright information and other user-generated entries
are also reset. Once reset, settings cannot be restored.
We recommend that you save settings using the [Save/load menu
settings] item in the setup menu before performing a reset.

Firmware Version

View the current camera firmware version. Firmware updates can be
performed if the memory card contains a new version of the camera
firmware.
A
Firmware Updates
Updates can be performed using a computer or smart device.
•
Computer: Check the Nikon Download Center for new versions of the
camera firmware. For more information, see the firmware download page.
•
Smart device: If the smart device has been paired with the camera using
the SnapBridge app, the app will automatically notify you when updates
become available, and you can then download the update to the camera
memory card via the smart device. For more information, see the
SnapBridge app's online help. SnapBridge may not display the notification
at the same time that updates are made available on the Nikon Download
Center.
B The Setup Menu: Camera Setup
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G button U B setup menu
G button U B setup menu