Nikon D5 - Information Display

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If Auto (AUTO) is selected, the color of the lettering in the
information display (0 220) will automatically change from black
to white or white to black to maintain contrast with the
background.
To always use the same color lettering, select Manual
and choose Dark on light (B; black lettering) or Light on dark (W;
white lettering).
Monitor brightness will automatically be adjusted
for maximum contrast with the selected text color.
Information Display
G button ➜ B setup menu
Dark on light Light on dark