How to position Closed Captions? not full screen

Hi,

I'm trying to use closed captions not on full screen, but in small window.

i can see closed captions, but those captions are in wrong position ( outside of video ractangle).
how to change position of closed captions ?

I did found "ClosedCaptionLabel" element in video. but "translation" or "scale" fields do not seams to work on captions.