To enable/disable Elevation Corrections in Garmin Connect* -
1. Sign in to Garmin Connect from a personal computer.
2. Select Activities in the expanded navigation bar on the left.
3. Select All Activities.
4. Select activity name.
5. Select Elevation Corrections drop down on the right (under the picture of your GPS unit/ watch.
*Changing this setting within an activity will not change how the Elevation Corrections are applied for future activities.