Nikon D780 Reference Manual page 134

4 [Auto]
i [Keep white (reduce
warm colors)]
j [Keep overall
atmosphere]
k [Keep warm lighting
colors]
D [Natural light auto]
H [Direct sunlight]
G [Cloudy]
M [Shade]
J [Incandescent]
Camera Controls
88
Option Description
White balance is adjusted automatically
for optimal results with most light
sources.
Eliminate the warm color cast produced
by incandescent lighting.
Partially preserve the warm color cast
produced by incandescent lighting.
Preserve the warm color cast produced
by incandescent lighting.
When used under natural light in place of
4 ([Auto]), this option produces colors
closer to those seen by the naked eye.
Use with subjects lit by direct sunlight.
Use in daylight under overcast skies.
Use in daylight with subjects in shade.
Use under incandescent lighting.