Expanding a function as an overlay over other groups/buttons

So i'm very new to using BTT, but i am really loving it. I believe i have seen a few images of people doing it. But on the native control strip on the macbook touch bar, if you for example click the volume the slider expands out of the button, instead of opening like a group on a new strip. Is it possible to do on BTT, and if so - how?

same here as well, how to expand things like groups instead of opening it in its own strip