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GMC 2009 Cadillac DTS Navigation Manual page 59

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Brightness/Contrast/Mode
Touch this screen button to change the brightness,
contrast, and mode of the display.
]
(Brightness): Touch the + (plus) or − (minus)
screen buttons to increase or decrease the brightness
of the screen.
_
(Contrast): Touch the + (plus) or − (minus) screen
buttons to increase or decrease the contrast of the
screen.
Auto (Automatic): Touch this screen button for the
system to automatically adjust the screen background
depending on exterior lighting conditions.
At night, the brightness can be adjusted with the vehicle
dimming knob near the headlamp switch.
Night: Touch this screen button and the system will
make the map background darker.
Day: Touch this screen button and the system will
make the map background brighter.
Setting the Clock
Press the MENU key to enter the menu options, then
press the MENU key repeatedly until the time is selected
or touch the time screen button, then press the Set
screen button.
Hours: Press the − (minus) or + (plus) signs to decrease
or increase the hours.
Minutes: Press the − (minus) or + (plus) signs to
decrease or increase the minutes.
12/24 Format: Select the 12 screen button for standard
time; select the 24 screen button for military time.
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