Looking to change the size of the preview image in the unfurl command and make it larger. I'd also like to change the size of the table that the unfurl data is shown in as well, make it larger too.
OK, so after days of research and scrutinizing templates, I found the top secret answer. Why somebody from XF couldn't have just told us this, I'm not really sure.
Here's the "modification".
Search your templates for the template "bb_code_tag_url_unfurl"
You're done. Your unfurl images will now be 200 pixels. There's also a "Medium" flavor, should you so choose. I think it's obvious how that would work.