调整鼠标和触摸板速度
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.
单击顶部菜单栏最右侧的图标，选择系统设置。
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.