This may sound like a complete rookie question. That's because it is.
In going from pedal tones to higher tones, I find I need to alter my embrochure. I don't think that's so weird for trumpet playing, but it is weird for me. (I only played trumpet for one year, beginning band. I played tuba for 5 years, and didgeridoo for 20+. Since you basically cram your whole face in those big bore instruments, I'm not aware of big embrochure shifts.)
At any rate, at this level of expertise (NOVICE!), I'm having to remove the horn from my face to accomplish this. Is this bad form? Should I be focusing on making embrochure adjustments while playing, midstream? Or am I just being obsessive?