Windows: https://www.wintools.info/images/ccp/Highlight-default.png
Mac: http://media.idownloadblog.com/wp-content/uploads/2015/01/Qu...
I also had another habit I dropped, in part because Mac OS X never supported it, but on Windows I would middle click in the middle of the screen and position the cursor just under the, well, scroll anchor I guess I could call it, leaving the page to auto scroll at a comfortable speed while I took my hands off the mouse and just read. If I recall correctly, if I did it just right, then the page would not just auto scroll, but highlight everything along the way.
Most of us became mac users with Mac Books, and they always had an incredibly responsive touchpad.
I believe it’s enough responsive to let us express our finger tics through it. The cursor actually become an extension of the finger.
I started using OS X in around 2002 and became a highlighter. I always wondered why.