HP Color LaserJet 8550 Multifunction Printer series - Manual (Page 38)

38 Chapter 1 Product introduction
EN
Adjusting the brightness of the touch panel
display
You can make the touch panel display brighter or darker by adjusting
the contrast. To do so, turn the dial located on the right side of the
copy module control panel, as shown below.
! To lighten the display, turn the dial in the clockwise direction.
! To darken the display, turn the dial in the counterclockwise
direction.
Figure 9 Control panel display contrast adjustment