Samsung NP900X3L-K06US User Manual page 26

Basics
Configuring touchpad gestures
Configure touchpad gestures to use the touchpad more efficiently.
Select the Start button ( ) → Settings → Devices → Mouse &
touchpad → desired options.
To cancel touchpad gestures, deselect check boxes for the
corresponding options in the Touchpad window.
Some options in the touchpad settings may not be
available depending on the model.
Touchpad lock
Press and hold the Fn key and press the F5 key to lock the
touchpad.
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