rotation of the arms

Dear Pro,

I would appriciate your help on the following.

I am wondering why often rotation of the arms is not much addressed when talking about the swing.

On the takeaway and backswing do you need to rotate the arms to the right ? in that way opening the club.

Or do you only rotate left on impact and further through the down swing ?

Thank you very much for your help. I hope the question in understandable.

Martin
Denmark