Add the option "Use regular expressions" to the other three options to search in PDFs ("Highligh all", "Match case", "Whole words") would be a very nice feature.
Ah you are right, I just found it, here's a screenshot of the exact setting in the "Advanced Search" window (it is pretty hard to find): https://imgur.com/a/ngHlWSr In Zotero it is called "Regexp".
I remember seeing this in older versions of Zotero. I don't see it in the Zotero 7 beta (OSX): is this perhaps moved elsewhere or not yet implemented in the beta?
Should still be there -- looking on windows, the arrow to select regexp is now on the right of the field, not on the left (not sure that's the right design choice, but that's a different question). Note that it's only available for select searches -- the only one I'm certain of is "Attachment Content" contains
https://imgur.com/a/ngHlWSr
In Zotero it is called "Regexp".
Note that it's only available for select searches -- the only one I'm certain of is "Attachment Content" contains