Sony VGN-CR42S/B User Manual page 36

Special-function button
Play/Pause button
Stop button
Previous track button
Next track button
Functions
Starts or pauses playback of a CD or DVD media or a music/video file stored on the hard disk drive.
Stops playback of a CD or DVD media or a music/video file stored on the hard disk drive.
Plays the previous chapter/file during video playback or the previous song/file during audio playback.
Plays the next chapter/file during video playback or the next song/file during audio playback.
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Using Your VAIO Computer