Cadillac 2006 CTS Navigation System Manual page 26

Display
Select Display to adjust the appearance of the screen.
The following items are available for selection or
adjustment:
Auto: Auto mode allows the system to automatically
adjust the display for day or night, depending on exterior
lighting conditions. Press the key next to the Auto
prompt to select it. An X will appear to show it has been
selected.
Day: Day mode is best suited for daylight conditions.
The displays are brighter with a lighter background
so they can be seen better during daylight hours. Press
the key next to the Day prompt to select it. An X will
appear to show it has been selected. You can select this
mode regardless of exterior lighting conditions.
Night: Night mode is best suited for nighttime
conditions. The displays are more dim with a darker
background so they can be seen better during nighttime
hours. Press the key next to the Night prompt to
select it. An X will appear to show it has been selected.
You can select this mode regardless of exterior
lighting conditions.
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Contrast: Press the key next to the Contrast prompt to
select it, then turn the TUNE/SEL knob to increase or
decrease the contrast. A bar graph on the screen
will reflect the change in contrast.
Brightness: Press the key next to the Brightness
prompt to select it, then turn the TUNE/SEL knob to
increase or decrease the brightness. A bar graph on the
screen will reflect the change in brightness.
Voice Volume
Select Voice Volume to adjust the volume level of
navigation voice prompts or to turn the prompts on and
off. See "Interrupt Volume" under Navigation Audio
System on page 3-2 for more information.
Clock
Select Clock to set the time and adjust other time
options. The following items are available for selection
or adjustment:
Hr +/−: Press the key next to Hr+ or Hr− to increase or
decrease the hour on the clock.
Min +/−: Press the key next to Min+ or Min− to increase
or decrease the minutes on the clock.