You can view and edit ebook file metadata by clicking the appropriate icon next to this file in the Book Card -> Files tab.
To rewrite metadata just enter new values and press OK. You can also copy values from the book card by clicking on the "Set from Book Card" arrows near each field.
The following ebook formats are supported for metadata editing: PDF, EPUB, MOBI, AZW, FB2, MP3.
If you want to backup files before editing metadata, you can set the appropriate checkbox in the bottom of the Metadata Editor window.
