Nikon D750 User Manual page 184

2
Set white balance to L (Preset manual).
Press the L (U) button and rotate the main command dial
until L is displayed in the information display.
L (U) button
3
Select a preset.
Press the L (U) button and rotate the sub-command dial
until the desired white balance preset (d-1 to d-6) is displayed
in the information display.
L (U) button
A Measuring Preset Manual White Balance (Viewfinder Photography)
Preset manual white balance can not be measured while you are
shooting an HDR photograph (0 177) or multiple exposure (0 216), or
when Record movies is selected for Custom Setting g4 (Assign
shutter button, 0 373) and the live view selector is rotated to 1.
156
Main command Information display
dial
Sub-command Information display
dial