Samsung NP270E5E-K01US - Manual (Page 39)

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Chapter 2.
Using the computer
Touchpad
Touchpad On/Off Function
Locking with shortcut keys
If you want to use the mouse only without using the touchpad,
you can turn the touchpad off.
To lock the touchpad function, press the + keys.
You can set the touchpad and touchpad button settings in
the tabs that appear when clicking Start > Control Panel >
Hardware and Sound > Mouse.
Auto-locking when connecting USB mouse
► When using the Elan driver
Click Start > Control Panel > Hardware and Sound > Mouse
> Touchpad, and check the Disable When external USB
mouse plug in option. This will turn the touchpad off when a
USB mouse is connected.
► When using the Synaptics driver
Click Start > Control Panel > Hardware and Sound > Mouse
> Device Settings, and check the Disable internal pointing
device when external USB pointing device is attached in
option. This will turn the touchpad off when a USB mouse is
connected.
This auto-locking function is not provided for some models.