How to use only lower case for the doi field?

fkutschera

Hi all,

I recently noticed that when I use the Zotero Connector and import a reference from a scientific journal's webpage, letters in the doi field appear sometimes in lower case and sometimes in all upper case.

Is there way to update the case of the doi field globally for all the entries in the library?

I have more > 2000 entries, so it would be very tedious to do it manually, however, I would prefer consistency.

Thanks!