Dear Paul @Paul-Lnrs
There is always the general setting within 'Lay Options- Carousel settings' here you can control positioning of captions.
However if you really want to force the captions to be somewhere e.g top left and fixed you can target the captions with Custom CSS:
.lay-carousel-sink-parent { insert custom css here }The Custom CSS options located in 'Lay options- Custom CSS & HTML'
https://laytheme.com/documentation.html#custom-css-styling
Apologies that i cant take you all the way to the exact answer Paul but i hope this helps you in the right direction :)
Best wishes and a wonderful day
Richard