Build the song as one big chorus and then try breaking the song into pieces. The repeats, DS, endings are just affect the printing of the fake book. They do not do anything to the song. You can make a real mess of the reats and the song will happily play what you originally created.

There are lots of bugs in the fake printing. 3rd and 4th endings don't work properly. you can't have a ds within a repeat (ie go here at the end of the repeat)

You can have variations in the notes of a 'verse' typically to allow for added words, but BIAB only print the notes from the first pass. Good fake music will usually show the added notes in brackets.

Many members of this forum do not use these options and often say that BIAB is designed to accompany the user, not to provide printed music. But if it is part of the software, as it has been for many years, it needs to be given the same consideration as any of the options in BIAB.

Fake Printing needs a complete rewrite.

BIAB for Windows Version 2019 (643)
Windows 10 (1909)