From the app drawer, select Setup > Altimeter.

Auto Calibration

Automatically calibrates the altimeter each time an activity is started. The device continues to automatically calibrate the altimeter as long as the device receives GPS signals and auto calibrate continuous is on.

Barometer Mode

Variable Elevation allows the barometer to measure changes in elevation while you are moving. Fixed Elevation assumes the device is stationary at a fixed elevation, so the barometric pressure should only change due to weather.

Pressure Trending

Sets how the device records pressure data. Save Always can be useful when you are watching for pressure fronts.

Plot Type

Allows you to view elevation changes over a period of time or distance, barometric pressure over a period of time, or ambient pressure changes over a period of time.

Calibrate Altimeter

Allows you to calibrate the barometric altimeter when you know the correct elevation or the correct barometric pressure (Calibrating the Barometric Altimeter).