I have installed mp3tag on Mac and I have managed to get REPLAYGAIN_TRACK_GAIN and REPLAYGAIN_TRACK_PEAK to appear as tag columns. However, I am also trying to add REPLAYGAIN_ALBUM_GAIN and REPLAYGAIN_ALBUM_PEAK as tag columns. This hasn't been successful for me.
When I go to the menu Settings >> File List ... and when I try to add %replaygain_album_gain% or %replaygain_album_peak% to that section, it does not display any album gain values for the tracks that I imported. I checked the sames files in Musicbrainz Picard and the values show up there. Am I adding album gain and album peak tags incorrectly?
I also need help to add Replaygain Track Gain and Replaygain Album Gain to the tag panel on the left so that I can batch remove the gain values for files I import.