Biab generates its automagic via key and chord layout. You can "unfold" your song to play one time completely through all of your changes, start to finish. Remove or add your turn around when needed that way etc . . . It won't "skip" over any chords, that I am aware of?

There is an option to "add/find" chord subs when stuck between changes. It is listed under the "Windows" heading in Biab. Great way to add a turn around or walk up/down to the next chord.

Trax