GPS City shows how to set the Data Fields for Running on the Garmin Forerunner 910XT. Make sure you're in Run Mode by pressing the Mode button and selecting Run from the List. Next choose Settings, Run Settings, then select to Data Fields. You have the option of 1, 2, 3 or 4 data fields, choose how many you want. After you've chosen the number of fields, you can highlight each field using the arrows to change the viewable option.