Nikon D3300 Reference Manual page 51

A
The Standby Timer
The viewfinder and information display will turn off if no
operations are performed for about eight seconds,
reducing the drain on the battery. Press the shutter-
release button halfway to reactivate the display. The
length of time before the standby timer expires
automatically can be selected using the Auto off timers option in the
setup menu (0 245).
Exposure meters off
A
The Built-in Flash
If additional lighting is required for correct
exposure in i mode, the built-in flash will
pop up automatically when the shutter-
release button is pressed halfway (0 89). If
the flash is raised, photographs can only be
taken when the flash-ready indicator (M) is
displayed. If the flash-ready indicator is not
displayed, the flash is charging; remove your
finger briefly from the shutter-release
button and try again.
When the flash is not in use, return it to its
closed position by pressing it gently
downward till the latch clicks into place.
Exposure meters on
"Point-and-Shoot" Modes (i and j)
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