In general, scrolling with the mouse is the normal way to
view information farther down a Web page. However, there are
sometimes occasions when it is preferable not to use a mouse. It
can be very convenient to use key combinations instead of removing
hands from the keyboard.
To scroll down automatically, use Shift. This scrolls down the page without further
intervention. Increase the speed by pressing Shift↓ again. Pressing Shift↑ slows down. To stop scrolling, use ↓.