I'm going to presume that by BIAB 9 you mean BIAB 2009. If that's the case, be careful there, because there is a version from long ago called BIAB v9 and there is now a BIAB 2009.

When you change the key as you did, it does not transpose the chords. That's because it's not changing the key, it is merely changing the key signature. That facility was added to BIAB to allow notation to look correct. You have to enter the correct transposed chords yourself (which shouldn't take you more than a few minutes to do).

That way, when you see the notes in notation view, you don't get all the accidentals because it was showing the notes based on the previous key signature.


John

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