Adding Captions to Header Image – Book Lite Theme

Hi,

I’m using the Book Lite theme on my website (nickdowson.net) and I’d like to find a way of adding captions to header images – so I can attribute them properly for creative commons. In particular I want to do this for the main one that shows up when you go to the site’s home page.

I don’t think the theme itself offers support for this (as I’ve filled in the forms in the media library for the image I’m using, both for alt text and caption) so I’m wondering how I could alter the theme to allow me to do this. As alt text would be fine if that’s the easiest solution, or maybe some discrete text bottom right that includes roll over possibilities for more and links (well that might be ideal).

I’ve already created a child theme but I can’t work out where to find the settings or code for this…

Thanks!