Moving View with Mouse?

From about 4:05-4:25, the video shows how to move the view around using only the mouse. The only thing that seemed to work for me was to use the scroll wheel to zoom in and out. Is there something I had to select to get into that mode? (BTW, I'm on a PC.)

JON-A-TRON26 days ago
Screen Shot 2017-09-25 at 10.54.23 AM.png