Adjust speed of the mouse and touchpad
If your pointer moves too fast or slow when you move your mouse or use your touchpad, you can adjust the pointer speed for these devices.
Click the icon at the very right of the menu bar and select System Settings.
Open Mouse & Touchpad.
Adjust the Pointer Speed slider until the pointer motion is comfortable for you.
You can set the pointer speed differently for your mouse and touchpad. Sometimes the most comfortable settings for one type of device aren't the most comfortable for another. Just set the sliders on both the Mouse and Touchpad sections.
The Touchpad section only appears if your system has a touchpad.