You can select PAGE to scroll through the main pages, and hold PAGE to switch between automotive mode and marine mode. The usage mode determines which main pages appear.

Marine mode

By default, five main pages appear in marine mode: map, compass, highway, active route, and position data. You can turn on the altimeter page in the display settings (Display Settings).

Automotive mode

By default, two main pages appear in automotive mode: map and trip computer. You can turn on the highway, compass, and altimeter pages in the display settings (Display Settings).