Sleep mode not available windows 8.1 notebook

[utag]

I have Asus X550LA notebook. This notebook runs Windows 8.1, 64bit UIEF. I can't see sleep mode in power menu as well as Windows Power control. If I flip the screen, it automatically shutdown/hibernate.

How do I enable sleep mode in Windows 8.1?

 

[Biglemon29]

Hibernate is sleep mode so hit when i close lid hibernate.