hi Tuan - yes, it resolved because I am using a smaller size image, and smaller fonts, and now the caption doesn't run over. thanks for checking.
can I ask a little different question, or should I put this in a new request? if that's better just let me know...
new request - is it possible to put a table in the caption, so that the 3 components of the caption (title / size / materials) could be laid out on the same line? like "size left aligned", "title centered", "materials right aligned"? example of this is here https://www.dennisdoheny.com/gallery.html
thanks Peter