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]
(..) - Hold on tight. - Got it. Hurry up, now. Everyone get in there and help them. We've got it tied on! Everyone, ready on my command. And... heave! - And... heave! - Heave! - And... heave! - Heave! (..)2001 Spirited Away