HP 460105-001 - Manual (Page 13)

Playing next track or section of an audio CD or a DVD (fn+f12)
While an audio CD or a DVD is playing, press fn+f12 to play the next track of the CD or the next section
of the DVD.
Muting speaker sound (fn+asterisk)
Press fn+asterisk to mute speaker sound. Press the hotkey again to restore speaker sound.
Decreasing speaker sound (fn+minus sign)
Press fn+minus sign to decrease speaker sound. Hold down the hotkey to decrease speaker sound
incrementally.
Increasing speaker sound (fn+plus sign)
Press fn+plus sign to increase speaker sound. Hold down the hotkey to increase speaker sound
incrementally.
Using hotkeys 7