Nikon Df User Manual page 106

❚❚ The L (U) Button
At settings other than K (Choose color temp.) and L (Preset
manual), the L (U) button can be used to fine-tune white
balance on the amber (A)–blue (B) axis (0 85; to fine-tune white
balance when L is selected, use the shooting menu as described
on page 84). Six settings in both directions are available; each
increment is equivalent to about 5 mired (0 87). Press the L
(U) button and rotate the sub-command dial until the desired
value is shown in the information display. Rotating the sub-
command dial to the left increases the amount of amber (A).
Rotating the sub-command dial to the right increases the amount
of blue (B). At settings other than 0, an asterisk ("E") appears in the
information display.
L (U) button
Sub-command dial Information display
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