Nikon D1 Manual page 70

If no other operation is performed, the monitor will stay on for the length of time
specified in Custom Setting 18 or the playback menu "Auto Off" option (if this
time is shorter than the time required to record the photograph, the monitor will
remain on for five seconds after the image has been recorded to the card). The
monitor will then turn off automatically to save power.
The operations that can be performed while the photograph is on display are
as follows:
To record the photograph
Press the button. The monitor will turn off and the photograph will be
recorded to the memory card.
To delete the photograph before it is recorded to the memory card
Half-press the shutter-release button, or press the
photograph will be deleted without being recorded to the memory card and
the monitor will turn off.
To turn the monitor on or off
Press the button to turn the monitor on or off. When the monitor is
turned off, a monitor indicator will appear in the rear control panel,
indicating that the photograph has yet to be deleted or recorded to the
memory card. The photograph will be displayed again when the monitor
is turned on.
Notes
Capture preview is only available in single-frame shooting or self-timer modes.
Photographs are not displayed when the camera is set to continuous shooting or PC
mode.
If, after the monitor has been turned off, another photograph is taken while the monitor
indicator is displayed in the rear control panel, the current photograph will be deleted
and the photograph just taken will appear in the monitor.
Camera Settings: Capture Preview Mode
or button. The
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