The "Genre" selector located in the property of a song, shows the musical genres of all the songs already in the archive. To add, and then create a new musical genre click inside the selector and write with the keyboard the new genre:


For compatibility with the format tags ID3v1 the genre field it's limited to 10 characters, but you can also use the comment field to extend the description of the song.

To delete a music genre from the list you must delete or edit all the songs belonging to that genre, until there is a song having that genre it will be visible in the selector.