Nikon D3X - Manual (Page 154)

128
Z
Exposure Compensation
Exposure compensation is used to alter exposure from the value
suggested by the camera, making pictures brighter or darker.
In exposure mode h, only the exposure information shown in the
electronic analog exposure display is affected; shutter speed and
aperture do not change.
To choose a value for exposure compensation, press the E button
and rotate the main command dial until the desired value is
displayed in the viewfinder or top control panel.
E button
±0 EV
( E button pressed)
–0.3 EV +2.0 EV
Main command dial