Android Studio is an embarrassment. Hey, it might be okay of it actually worked, but it doesn't! I have never actually succeeded at using its visual tools to lay out elements on a screen. I’m sure it’s theoretically possible; but every time I’ve tried, I’ve gotten so frustrated that I’ve just given up and written raw XML layout files instead. The same is true for the other tools. Strange that Google should have messed this up so badly, when they're leaders in other technologies.