Nikon Z 8 Reference Manual page 797

D
Restoring Default Settings
Depending on current settings, some menu items and other features may be unavailable. To access
menu items that are grayed out or features that are otherwise unavailable, try restoring default
settings using the [Reset all settings] item in the setup menu.
Note, however, that wireless network profiles, copyright information, and other user-generated
entries will also be reset. Once reset, settings cannot be restored.
797
Before Contacting Customer Support