I’d like to be able to do this too. Hmm.. let me do a test. Ok, when I get the sharing link and paste it, it becomes oneboxed. This is fine for me, though of course it would be nice if it showed up more prettily.
https://nextcloud.kb2.org/s/KRj8rtwaL5wFraT
Here’s the same image with the ?format=.jpg appended.
