Multiple bikes and barometric correction

Wondering if anyone can help me with this? - I'm a newby but haven't been able to work out how to add several bikes to my profile on Garmin Connect instead of only one default. I would like to be able to toggle easily through the different bikes I use for each activity or else there is not really any point I can see in filling in the gear fields. Also does anyone know how to enable the barometric correction to enabled as it is disabled by default on the Vivoactive?
:confused:

You just need to go to the gear widget on the website, go to full page, and do "add gear" for your bike. You may need to edit the first one you had so it's not automatically added to activities. Then when you do an activity, you can assign the bike you use.

The vivoactive doesn't have a baro sensor, and in reality, the default for elevation correction should be "enabled", but for some reason, they default to disabled. Elevation correction tries to fix stuff based on known elevation based on GPS location, as elevation using only GPS data is often quite wrong.

Changing the default for elevation correction has been suggested a number of times.