Yes, I should have been more informative

BIAB version: 2010.5

What I did:
Starting from scratch I set the main key to Ab in order to make it easier to enter melody with the proper accidents, with a mouse. The commercially available sheet music indicates key of Ab (4 b's)
When I reached the bars where the key temporarily changes to B, I set that key change via F5 and entered C3m7. BIAB changes this to Dbm7.

Based on you replies, I did a test starting with the overall key as C but BIAB still wants to change the displayed chord toDbm7.

It is not a major issue as the main purpose is to practise improvisation over the chords and the chords sound the same any way, but if I only could control that little detail also...

Is there an Opt. - Preferences setting I have overlooked? Or am I running a too old version?

Br Kamilu