Samsung NP940X5J-K01US - Manual (Page 52)

Basics
52
Touchpad lock
Hold down the Fn key and press the F5 key. You can lock the
touchpad.
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Configuring touchpad gestures
Configure touchpad gestures to use the touchpad more efficiently.
Open the Charms and then select the
Settings charm → Change
PC settings → PC and devices → Mouse and touchpad →
desired options.
To cancel touchpad gestures, drag the switches for corresponding
options to the left.
Some options in the touchpad settings may not be
available depending on the model.