Nikon Z 9 Reference Manual page 144

•
E icons and exposure indicators appear in the shooting display and
control panel. In modes other than M, the zero ("0") at the center of
the exposure indicator flashes. The current value for exposure
compensation can be confirmed by pressing the E button.
Monitor
•
Normal exposure can be restored by setting exposure compensation
to ±0.0. Exposure compensation is not reset when the camera is
turned off.
A
Mode M
•
In mode M, exposure compensation affects only the exposure indicator;
shutter speed and aperture do not change.
•
When auto ISO sensitivity control ( 0 156) is in effect, ISO sensitivity is
automatically adjusted according to the value selected for exposure
compensation.
A
Using a Flash
When an optional flash is used, exposure compensation affects both flash
level and exposure, altering the brightness of both the main subject and the
background; if desired, the effect can be restricted to the background using
Custom Setting e3 [Exposure comp. for flash].
Exposure
144
Viewfinder Control panel