For the scrolling parts of the service page, if you have a mouse with a scroll wheel, point the mouse into the area you want to scroll and then roll the scroll wheel - some people get confused by the scroll bars that the browser displays but we typically don't use those because the volume of data users have is too much to load into your browser in a single go.
Alternately if you are using a notebook, particularly a Mac or Windows 10 machine, position the cursor over what you want to scroll and then slide two fingers side by side up the trackpad together.