Lexmark Optra C Service Manual page 119

5045-001
Density Adjustment
1. Press the COLOR SELECT key and select the color of your
choice. The LEDs light indicating the selected color and that
density.
2. Select the density by the + key or - key. When the selected
density differs from that currently set in the printer, the Density
gauge LED flashes.
3. Save the density by the ENTER key. The Density gauge LED
lights and the printer density changes.
Diagnostic Aids 3-14