I got only one fully customizable data screen with at most 10 fields and I couldn’t figure out how to add new data screens on the edge 520. Does anyone know how to add new data screens?
training>settings>activity profiles>TRain>data screens> give you option to turn on/off 5 data screens plus Map, Compass, ElevationLap Summary, Virtual Partner, Cycling dynamics, from each one you can then edit the data you want displayed on each of the screens.
Remember you have 3 different activity profiles and can create others, so within these profiles you can choose different sets of data screens as you you want according to your activities.