MSI GE70 APACHE PRO - Manual (Page 14)

Introductions
2-6
Keyboard LED
Backlit Switch
(optional)
Š This keyboard is equipped with flash keyboard LEDs which
are mounted beneath the keyboard.
Š Use this button to switch ON or OFF the KLM application
(Keyboard LED Manager)
SSE
Layer Switch
(optional)
Š This notebook may be preinstalled a unique keyboard
manager application, SSE (Steel Series Engine). With
this application, users will be able to own 4 different
combinations of keyboard hot keys defined separately for 4
specific occasions.
Š Use this button repeatedly to switch between keyboard 1
(layer 1,) keyboard 2 (layer 2,) keyboard 3 (layer 3) and
keyboard 4 (layer 4) recurrently.