Those are Part Markers.

Blue part marker plays Substyle A while Green forces the playing of Substyle B.

There will also be a Drum Fill forced in the bar preceeding any Part Marker.

Blue Part Markers are generally good for the first and last times through the chorus, while Green is good for the middle choruses where soloing etc. may take place. The B substyle may have a bit more of a walking bassline, etc. in it for that purpose.

Sometimes for Pop song work, the entire song is better kept in one Substyle, typically the A substyle.

The Help file and the BiaB FAQs contain more information on these. If you want to remove or change one, just keep clicking on it and it changes from Blue to Green to None.

Some styles are "Multi-Styles" and may contain more than just those two, indicated with differing colors as you toggle through them. Good idea to AUDITION each to see what it does and whether it works or not in your particular chosen song context.


--Mac