Increasing Speaker Sound (Fn+F9) (Select Models); Playing The Previous Track Or Section Of An Audio Cd Or A Dvd (Fn+F10) (Select Models); Playing, Pausing, Or Resuming An Audio Cd Or A Dvd (Fn+F11) (Select Models); Playing The Next Track Or Section Of An Audio Cd Or A Dvd (Fn+F12) (Select Models) - HP 625 WS775EA User Manual