How to use the Samsung Galaxy smartphone Mouse and trackpad function

Mouse and trackpad
Configure pointer speed and button assignments for an optional mouse or trackpad
(not included).
◌ From Settings, tap General management > Mouse and trackpad.

• Pointer speed: Drag the slider to the right to go faster or to the left to go
  slower.
• Wheel scrolling speed: Drag the slider to the right to scroll faster or to the left
  to scroll slower.
• Enhance pointer precision: Enable to make the mouse cursor move faster or
  slower depending on how fast you move your mouse.
• Pointer size and color: Change the size and color of the mouse pointer.
• Primary mouse button: Choose either the Left or Right mouse button to be
  your primary button.
• Secondary button: Choose the action of your secondary mouse button.
• Middle button: Choose the action of your middle mouse button.
• Additional button 1: Choose an action for another available mouse button.
• Additional button 2: Choose an action for another available mouse button.