Again, very well explained.

This might turn out to be a Wishlist item if no one else can help, but I have a few thoughts.

In BIAB 2017, I use Bar-based Section Letters to help prompt me, things like I for Intro, A, B, S for Solo etc. but this feature wasn't introduced until (I think) version 2016.

You mention you read charts as PDFs on an iPad. Do you have a bluetooth foot pedal to turn pages? I use an AirTurn by Digit. If so, then unfolding the BIAB song to one long chorus shouldn't be a problem. Then you can write whatever you want as text/lyrics wherever you want. I say this because your real difficulty seems to be that you are trying to avoid unfolding. Do I have this correct?

BIAB 2025 Win Audiophile. Software: Studio One 7 Pro, Swam horns, Acoustica-7, Notion 6, Song Master Pro, Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus 192 & Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors.