Closed Captioning

I have an XG1v4 connected to a Samsung UHD TV,  When I enable captions, they appear in int middle of the screen.  I have gone through the preferences on the XG1v4, and I cannot find an option for where the captions should appear,  I would like to have the captions on the bottom of the screen.  Is there a way to control where the captions are displayed?