Hi all, I thought this might get more eyes in the open forum, so I'm posting it here.

I'm putting together the session charts for a demo -- NNS and lead sheet with the lyrics/chords -- and I need to indicate a part that has overlapping vocals. I've tried to find info on google on how to do this, but everything that comes up is either about standard musical notation or about recording or about voicing choirs, etc., none of which is applicable. And I'm not finding anything in Nashville Number System symbols that could be used to communicate this. I think I'm not googling the right thing.

I used to put together charts all the time in Nashville, but I don't recall ever seeing a chart that had overlapping vocals, though I'm sure they exist -- is there an industry standard way of denoting that that I'm not aware of?