Some of you already know this, and some of you may have discovered it by accident one time. It’s a feature of the scroll button on your mouse.
Right now, try clicking on that scroller button – just push it down like a regular mouse button. Do you see something appear on the screen? Now move the cursor up, then back down. When that special icon is on the screen, you have enabled automatic scrolling. To scroll down a web page (or a text document), all you have to do is move the mouse down – no clicking required!
To go back to “normal” mode, just click the scroller button again and the scrolling icon disappears.