Slot Empty Release Lock; [Slot Empty Release Lock] - Nikon Z 6II Reference Manual

Slot Empty Release Lock

Choose whether the shutter can be released when no memory
card is inserted in the camera.
Option
[Release
a
locked]
[Enable
b
release]
The shutter cannot be released when no memory
card is inserted.
The shutter can be released with no memory card
inserted. No pictures will be recorded; during
playback, the camera displays [Demo].
G button U B setup menu
Description
B The Setup Menu: Camera Setup
495