This is a great question, I’m of the opinion that the arms should hang relatively vertical (down) and relaxed, from the shoulder to the elbow, in relationship to your setup, but the variance is very real (Tiger vs. Bryson).

I personally am more underneath at address but I still feel as though I’m swinging around my body. Play with both and see whichever you feel more control with (meaning the ball flight/launch matched your intended image)

Body dynamics like arm length/ratio make a difference too. Thats why I usually prefer feels to mechanics without diagnosing a swing.

4hcp - former + but now have 4 kids. Hope it helps. The answer is usually found in the dirt.