Komatsu ecot3 Operation And Maintenance Manual page 117

DETAILED CONTROLS AND GAUGES
Adjusting Screen
Use this screen adjustment menu to adjust the brightness,
contrast, and back light of the screen.
1. On the standard screen, press switch F6.
2. Select screen adjustment on the user menu, then press switch
F6. The screen switches to the selection menu screen for
screen adjustment.
On machines equipped with cameras, it is possible to adjust
the brightness, contrast, and back light of the cameras
screen on this menu.
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OPERATION