Two methods can be used to control the scrollbar.
- Leverage the mouse button
- Move the mouse to the top of the scroll bar, click the left button of your mouse to select the scroll bar, then press the left mouse button to drag the mouse. This time the scroll bar will move up and down or left and right.
- Leverage the mouse wheel
- Move the mouse to the top of the scroll bar, click the left button to select the scroll bar, then turn the mouse wheel. This time the scroll bar will start to move up and down. If it is a horizontal scroll bar, you need to hold down the SHIFT key first, and then turn the wheel.