How can I set it up so that I can see at a glance whether a track has album art embedded in the ID3v2 tag or not? Like an X or something in the "spreadsheet (main) view"?

Just a small addition to Sebastian's response: If you want to display an 'x' for files which have cover art, just create a new column at View > Columns... and enter $if(%_covers%,x,) as Value :slight_smile: