Henny, so there's nothing "Quick Select" about them? They're just 6 additional momentary buttons that can be assigned functions like the two on the back of the X20? Seems like there's more to it than that. For example, I've discovered that when you randomly push one of them down, it lights up. Then if you push a second one down, the light transfers to that button. But once you've pushed one of them down, you can't get all of them to go dark again. Am I right that there is no official detailed documentation anywhere from Frsky about how these Quick Select buttons are supposed to work?