Nikon D4S - Manual (Page 190)

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r
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,
0 324).
A
Protected Presets
If the current preset is protected ( 0 176), 3 will flash in the top
control panel and viewfinder (and L in the rear control panel) 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.