GMC 2007 Envoy - Manual (Page 286)

DVD Player Buttons (Without Sunroof)
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.
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.
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