Agreeing with other comments here: I need to be able to toggle the right side panel closed so the mail window is wide enough to see the full mail preview panel. I'm using a 13" MacBook, and that right panel takes up too much space. Allow us to hide it or toggle it. This makes using Yahoo Mail painful. I don't want to give up on Yahoo Mail after many years, but this will drive me away unless it is quickly fixed.
Agreeing with other comments here: I need to be able to toggle the right side panel closed so the mail window is wide enough to see the full mail preview panel. I'm using a 13" MacBook, and that right panel takes up too much space. Allow us to hide it or toggle it. This makes using Yahoo Mail painful. I don't want to give up on Yahoo Mail after many years, but this will drive me away unless it is quickly fixed.