Asus X502CA - Manual (Page 33)

Notebook PC E-Manual 
Multimedia control keys (on selected models)
The multimedia control keys allow you to control multimedia files,
such as audios and videos, when played in your Notebook PC.
Press in combination with the arrow keys on your Notebook
PC, illustrated as below.
Stop
Play or
pause
Skip to
previous
track or
rewind
Skip to
next track
or fast
forward
Numeric keypad (on selected models)
A numeric keypad is available on
selected Notebook PC models. You
can use this keypad for numeric input
or as pointer direction keys.
Press to
toggle between using the
keypad as number keys or as
pointer direction keys.