Nikon D810 User Manual page 186

D
Direct Measurement Mode
If no operations are performed during viewfinder photography while
the displays are flashing, direct measurement mode will end in the
time selected for Custom Setting c2 (Standby timer, 0 319).
A
Protected Presets
If the current preset is protected (0 169), 3 will flash in the control
panel and viewfinder if you attempt to measure a new value.
A
Selecting a Preset
Selecting Preset manual for the White
balance option in the shooting menu
displays the dialog shown at right; highlight
a preset and press J. If no value currently
exists for the selected preset, white balance
will be set to 5200 K, the same as Direct
sunlight.
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