GMC Envoy Owner's Manual page 261

DVD Player Buttons
O (Power): Press this button to turn the RSE system
on and off. The power indicator light will illuminate
when the power is on.
X (Eject): Press this button to eject a DVD or CD.
SRCE (Source): Press this button to switch between
the DVD player and an auxiliary source.
c (Stop): Press this button to stop playing, rewinding,
or fast forwarding a DVD or CD. Press this button
twice to return to the beginning of the DVD.
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s
(Play/Pause): Press this button to start play of a
DVD or CD. Press this button while a DVD or CD is
playing to pause it. Press this button again to continue
the play of the DVD or CD.
y
(Main DVD Menu): Press this button to access the
DVD menu. The DVD menu is different on every
DVD. Use the up, down, left, and right arrow buttons to
move the cursor around the DVD menu. After making
a selection press the enter button. This button only
operates when playing a DVD.
z
(Set-up Menu): Press this button to adjust the
color, tint, brightness, contrast, display mode, and
dynamic range compression. The dynamic range
compression feature can be used to reduce loud audio
and increase low audio produced by some DVDs.
To change a feature back to the factory default setting,
press this button to display the feature, then press
and hold this button. The default setting will appear on
the display.
While playing an Audio or DVD disc, press and hold
this button to display and to remove the track and
time information.