I spent 2 days trrying to get use to the click pressure for the different modes. At first it seemed kinda hard so I would practice like when driving or walking or sitting. Most of the time my half presses were unsuccessful. It seemed the button pressure sensitivity was too sensitive. Well I found out that you just have to Tap like on your iPhone. Now I'm a pro! I think Manker should use words like "Tap" in their manuals. Anyways if others find the clicking for modes tough, just try tapping then you'll be a pro like me.