Actually it is not grayed out, it’s just because it’s selected.
But, how do I check if the audio files are matched to the tracks? I barely know how to use it to be honest. It seems like a very promising software but also not very intuitive. Are there any other links to read more?
Thank you for your help
EDIT: I just got it, I just have to drag the track on the tag! Fantastic, I didn’t understand that. Thank you for your help, I thought 0/10 meant 0/10 were saved.It isn’t enough to just press tagger, I have to drag the album from the left to the right as well! I didn’t understand that.