3.4.2 Fast Cumulative Button
This function is furnished in the Altimax and S-Lander models. This allows the user to check the cumulative
vertical ascent/descent in feet or meters, as well as number of runs of the current logbook while recording.
Accessing this information is performed by pressing the [-] button in any of the main modes. When activated,
three displays will automatically rotate in intervals of four seconds.