Nikon D5300 - Manual (Page 125)

105 P, S, A, and M Modes
4
Select Yes.
The menu shown at right will be displayed;
highlight Yes and press
J.
The camera will enter preset measurement
mode.
When the camera is ready to measure white
balance, a flashing
D (L) will appear in
the viewfinder and information display.
5
Measure white balance.
Before the indicators stop flashing, frame the
reference object so that it fills the viewfinder
and press the shutter-release button all the
way down. No photograph will be recorded;
white balance can be measured accurately
even when the camera is not in focus.