Nikon Z 9 Reference Manual page 572

•
Enable or disable first-frame exposure lock.
- [OFF] is recommended if lighting and other conditions will not
change during shooting, [ON] when photographing landscapes
and the like under variable lighting.
- Selecting [ON] locks exposure at the value for the first shot,
ensuring that all photos have the same exposure. Large changes
in subject brightness during shooting may however result in
apparent variations in exposure. This can be addressed by
selecting [OFF].
•
Choose starting folder options.
Highlight [Starting
storage folder] and
press 2 .
C The Photo Shooting Menu: Shooting Options
572
Highlight [First-frame
exposure lock] and
press 2 to select [ON] or
[OFF].
After highlighting the
desired options and
pressing J to turn them
on ( M ) or off ( U ), press
4 .