The Activity display is selected from the Main page. Its navigation buttons go back there or to the Messages page. It also always shows its header the time, date and battery voltage. The battery voltage display changes color with range: Blue, Green. Red. On red, turn off or plug in a charger! Each also shows the minutes since the previous receipt.

The central area shows the fields of the most recently-received message with meaning and its units  included.

    The page goes totally blank after a delay settable in preferences unless the battery is being charged

Activity Display