An error occurred while saving the commentPeter Varley commented
5 years later ...
It is not clear but I think this is what I want. Some of my photos have a long caption and so I want the first line to show below the photo (or a label "Caption below") and then allow the user to swipe up (scroll down on desktop) to see the full caption. I experimented and found that you can put HTML in the 'title' of the options object but as the caption gets longer, the photo gets smaller. I did set closeOnVerticalDrag: false but the content is not draggable vertically.
I am going to attempt to implement this and I'll make a pull request in the (unlikely) event I can make it work.