Presets are designed to work with a TV series. With a TV series you have a
number of files (episodes) that share some information (cover art, cast, genre, ...)
but not others (Title, Episode ID, Episode Number, ...). With a preset you fill in
the information that will be shared by all episodes, making sure that the fields'
check boxes are checked. You then create a preset from the preset menu. Then
you can select all the episodes from that show, apply the preset and then edit just
the fields that are different for each episode.