Samsung Galaxy Note5 User Manual page 199

Mouse/Trackpad Settings
Configure settings for using an optional mouse or
trackpad (not included).
1. From a Home screen, tap Apps > Settings.
2. Tap Language and input > Pointer speed.
3. Drag the slider to the right to go faster or to the left
to go slower.
4. Tap OK to save your setting.
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Settings Language and Input Settings