During a ride, i added the fields “Fat and Carbs” on my Garmin Edge 520. It works pretty good! But after the ride, i would like to see these infos also in my activity on xert. But where?
Stay tuned… 
still waiting for it.
Still testing…
If you’ve got a garmin press lap button after ride This saves it as a screen shot which if you are using Strava you can import it to the ride as a photo. Not ideal but at least you keep the info