Power Button; Numeric Keypad - Asus X540L E-Manual

Power button

Press the power button to turn your Notebook PC on or off. You
can also use the power button to put your Notebook PC to sleep
or hibernate mode and wake it up from sleep or hibernate mode.
In the event that your Notebook PC becomes unresponsive,
press and hold the power button for at least four (4) seconds
until your Notebook PC shuts down.

Numeric keypad

The numeric keypad toggles between these two functions: for
numeric input and as pointer direction keys.
NOTE: For more details, refer to the Using the numeric keypad
section in this manual.
18 Notebook PC E-Manual