Toshiba Satellite M50 (PSM53) - Manual (Page 82)

TOSHIBA M50 4-14
Operating Basics
Buttons
The Internet button and the CD/DVD button can be assigned functions and
applications in the TOSHIBA Controls Properties.
CD/DVD play control buttons
In addition to the power button, the following four buttons control functions
relating to the playback of optical media and digital audio data:
The availability of the Buttons depends on the model of computer you have
purchased.
Play/Pause Starts or pauses play
Stop Stops play
Next Advances to the next track, chapter or data
Previous Returns to the previous track, chapter or data
If Random or Shuffle is selected in Windows ® Media Player, selecting Next
or Previous advances to a random selection.