From the altimeter, select MENU.

Reset

Resets the altimeter data, including waypoint, track, and trip data.

Altimeter Setup

Access additional altimeter settings (Altimeter Settings (GPSMAP 66)).

Adjust Zoom Ranges

Adjusts the zoom ranges shown on the altimeter page.

Change Data Fields

Allows you to customize the altimeter data fields.

Restore Defaults

Restores the altimeter to factory default settings.