To enter Navigation mode from the Observation mode, touch anywhere on the screen. The navigation buttons appear on top of the data page. If you do not press a button, the navigation buttons disappear after a while and the Observation mode returns.
The Navigation mode is displayed automatically when there are unacknowledged alarms on the Alarms page.
To exit the Navigation mode, touch an area on the screen where there are no selectable items, or press Menu.