Hello BiaB-ers
please can someone help me?

I would like write into BiaB song which has form A-A-B-A (8+8+8+8 bars). It's one chorus with melody (theme).
This chorus is repeated 4 times (first is played theme, second and third chorus is for playing solos and fourth (last) chorus is played theme again).
But I need change (only) last chorus for playing melody (theme) in following way: A-A-B-A-coda, where coda is repeating (3 times) of last 4 bars.

How can I set this coda for playing only for last chorus? And how can I write (or change) coda's melody (melody in coda is similar to last 4 bars, but not the same)?

And I don't want last two bars, which BiaB automatically added to end of every song. How can I delete/erase it?

very thanks for all useful helps

Fred.