Currently, it will rename PDFs that are recognized automatically as long as you have automatic renaming enabled in the General pane of the preferences.
It won't automatically rename a PDF you drag to an existing item, but we hope to address that soon. For now, you'd have to right-click and choose Rename File from Parent Metadata.
Thanks. I'll have to digest this linked files business. Basically, this option would be renaming the remote / outside of Zotero folder file that lives somewhere else, as I understand.
Yes, but it's not relevant if you're not using linked files, and regardless it has the same behavior as I described above. I answered your question above.
It won't automatically rename a PDF you drag to an existing item, but we hope to address that soon. For now, you'd have to right-click and choose Rename File from Parent Metadata.