With my previus, old, Garmin ForeRunner 735xt I was able to change the type of activity while recording an activity.
For example I start with mountain biking to approach a location, then maybe I leave the bike and I start hiking, then maybe a short section of trail running til an alpine lake, then maybe swimming, then again running, hiking, biking to come back.
With FR735 I don't have to know in advance the exact sequence of activities and to create a custom multisport activity for each and every possible sequence, combination and repetitions of basic activities i can do in the surroundings of my home which include also backountry skiing, downhill skiing, freeride touring in the middle seasons.
How to do the same with my brand-new super-powerful "Fenix 6X Pro"? I'm unable to replicate that behavior...
