Putting your notebook pc to sleep – Asus X751LD User Manual
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Notebook PC E-Manual
Putting your Notebook PC to sleep
To put your Notebook PC on Sleep mode, press the power button once.
You can also put your Notebook PC to sleep mode
using Desktop mode. To do this, launch the desktop
then press alt + f4 to launch the Shut Down window.
Select Sleep from the drop-down list then select OK.