I’d be grateful if anyone can tell me, is it possible when clicking photographs in a blog for these to expand to a slideshow or something similar.
Thanks
Wix Blog is a Wix app and you are limited with what you can do with it in code.
https://support.wix.com/en/article/corvid-wix-blog-posts-collection-fields
You can find something similar in Wix Support’s own pages for the New Wix Blog app here.
https://support.wix.com/en/article/adding-a-gallery-to-a-post-in-the-new-wix-blog