I've been looking for this from day 1 of release for the 5X. I can't find any documentation other than support for the sensor. And what I can tell is changing between different built in apps does set some basic screen details, but nothing useful and mostly a bunch of timer fields. Very disappointed in Garmin since this works just fine on my Edge 520. I'm still carrying my 520 in my pocket to get HR data to the Vision. On one beta there was HR on the Run activity, but its been gone for awhile. Each beta seems to have different screens for the same activities, but still mostly a collection of timers.
