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]
(..) - I'm not going to. - Take it off. - No! - Now! - Okay! Easy. As you command, Your Highness. -- -- . Oh, you were expecting Prince Charming. Well, yes, actually. (..)2001 Shrek