I'm not being flippant when I suggest that if you can fit everything you need on to one screen, there is no need to scroll. My eyes are old enough to need reading glasses, so on the first screen of my 510, I have just six fields. It keeps two of them (average speed and current speed) big enough to see very easily, and the other four (current cadence, average cadence, time, heart rate) are still readable. The other screens are available if I want to see them, but I've never bothered to scroll while riding.