How to change the move / calorie Activity goal on an Apple Watch?

I've recently set up a new Apple Watch; during the setup process I selected the "most active" setting (*Very Active*, I think). Now that I've seen the daily targets in the Activity app, I realise that the move/caloria goal (red ring) is too high. Can I change that? I've looked in a bunch of places, including the general *Settings*, *Health* settings, and *Activity* settings (all in the *Watch* app on the iPhone) - and the *Activity* app on the iPhone. But no luck. Additionally, can the three goals be changed independently?