Btw, I notice you use the tag panel in a horizontal layout but are using an older version of Mp3Tag. There were big improvements to the horizontal layout as of v2.89 onward that are definitely worth checking out (see my GIFs of it in action here).
It allows (if desired) for tag columns to flow into more columns to fill up the empty space, making more fields visible at once. Additionally narrower, space-saving fields are now available, useful for shorter tags.