She has a reputation that 'commands' attention/respect. [=people give her respect/attention because of her reputation]
In the United States, the President as the commander in chief is at the head of the military 'chain of command'.
She seems to be 'in (full) command of' the situation. [=she seems to have complete control of the situation]
(..) you're welcome to leave anytime. Well, for the record, Superdad, I'm not hiding with you. I'm hiding out with that big guy. Sensei, with your fate unknown, Bumblebee has held command, despite his complete and total lack of anything resembling warrior discipline. He's like a child. (..)2014 Transformers: Age of Extinction