Looking for a little help from someone that has the GW4. Mine is on order scheduled to ship on 9/17. One particular review I watched the person was going through exercises on watch and I noticed a plus symbol on the watch. Was wondering what type of activity or exercise(s) you can add. Example if you open S health on your phone to start an activity/exercise it has a bunch of them such as kayaking, rowing, skiing etc. Using the plus symbol on the GW4 can you add an activity such as skiing to the watch or does it just add something that was hidden on the watch? Any help would be greatly appreciated.