AutoScrolling is a valuable feature that enables you to scroll through a document automatically, without the need to roll the wheel or click the scroll bar.
To AutoScroll
Within a program, such as Microsoft Word or Microsoft Excel, click the wheel button—the default AutoScroll assignment—and observe the position of the origin mark that appears.
Move the pointer in the direction that you want to scroll. The further you move the pointer away from the origin mark, the faster the document scrolls.