MSI Wind U110-031US User Manual page 32

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Caps Lock: Glowing green when the Caps Lock function is activated.
Num Lock: Glowing green when the Num Lock function is activated.
Scroll Lock: Glowing green when the Scroll Lock function is activated.
Hard Disk/ Optical Drive Device In-use:
Blinking green when the system is accessing the hard disk drive or the optical
drive device.
5. Touchpad
This is the pointing device of the notebook.