I know all about the Part markers.
Part 1a is straight and part 1b the bass starts to walk etc. etc.

And usually this happens on the second run through the changes.

Well I want to mix the bass line so that the first two bars the bass plays on beat 1 and 3 and then the third bar the bass starts to walk (one note per beat) for two bars, etc.
I just tried to insert part markers in 1st bar and the 3rd bar.

Besides breaking up the screen into a nasty look (first two bars on their own line, third bar starts a new line)
the Part marker 1b did NOT have the bass start walking!

Is there an easy way to accomplish this in BIAB?
Bass walks exactly where I want it to walk and then plays half notes the rest of the time?

Further to this question...
Is there also an easy way (without copying all the chords again at the end) to let BIAB know that after the 1st/2nd repeat is played the bass should start walking for the rest of the song?

A BIAB user for more than 30 years (if you can believe it) !