I noticed that Clinton made an active effort to take control of the entire stage. She would walk up to people and talk to them directly. This also had the effect of her cutting into Trump’s side of the stage; he just puttered about his chair, never daring to step foot in Clinton’s territory.
I think this is why trump was so often in her shots; while she moved forward, he stayed put in the background.
Her body language and comport was pitch perfect; I expected nothin less from her.