Displays the GPS speed and altitude. One is displayed on the watch face using the largest possible characters depending on the number of digits. The other is in a smaller characters below that. Both are always visible. You can display the current or maximum observed speed/altitude values.
BTN3 : Short press <2secstogglesthedisplaysbetweenshowingthecurrentspeed/altvaluesorthemaximumvaluesrecorded.
BTN3 : Long press > 2 secs resets the recorded maximum values.
App Settings : Select the desired display units. Speed can be as per the default locale, kph, knots, mph or m/s. Altitude can be feet or metres. Also select whether time is displayed or hidden.