Closed Captions on FireStick (2nd or 3rd Gen)

The last discussion on this subject was in 2015. However, I am interested to find out if Tablo will be able to reduce the size of the closed caption print for the FireStick or is this a common size with all streaming devices that use Tablo?? Many of the other services allow the user to select the size of the print. Right now the print size is so large it is blocking what we are seeing on the bottom 1/4 of the screen. Can this be changed? Thanks much.