Nikon D3300 User Manual page 291

D
Measuring Preset White Balance
If no operations are performed while the displays are flashing, direct
measurement mode will end in the time selected for the Auto off
timers option in the setup menu (0 245). The default setting is eight
seconds.
D
Preset White Balance
The camera can store only one value for preset white balance at a time;
the existing value will be replaced when a new value is measured.
Note that exposure is automatically increased by 1 EV when measuring
white balance; when shooting in mode M, adjust exposure so that the
exposure indicator shows ±0 (0 109).
A
Other Methods for Measuring Preset White Balance
To enter preset measurement mode (see above) after selecting preset
white balance in the information display (0 125), press J for a few
seconds. If white balance has been assigned to the Fn button (0 251),
white balance preset measurement mode can be activated by keeping
the Fn button pressed for a few seconds after selecting preset white
balance with the Fn button and command dial.
A
Gray Panels
For more precise results, measure white balance using a standard gray
panel.
132 P, S, A, and M Modes