|
Um, I assume you mean the per-book Edit Metadata popup.
A single book can't have multiple publishers, but you can edit that box -- it is a regular text field...
If you want to clean up junk publishers across your whole library, you can rename a publisher or delete it by right-clicking the name in the Tag Browser. Or selecting multiple books at once and using Bulk Edit Metadata.
Metadata that no longer matches any book in your calibre library, is automatically cleaned.
|