I’m trying to add sidemen to a Charlie Parker box set and not seeing how best to do it. The sidemen vary by groups of tracks across 7 discs, and have the information from the booklet but would need to add them manually. I see an extensive “personnel” tagging system that has been added to Roon, but that seems to only apply to Classical recordings? How to do this for my jazz?
Try adding Classical as a Genre to the album.
It’s probably that which triggers the performance entries. It’s what triggers the Focus tool to allow Composer/Composition
Bit of a hack 
could claim it as Classical Jazz 
Cool, could try that. However, I just added performer credits which seems to have worked.