Hi Mac,

Thanks for the response,

simple example uploaded to here: http://dl.dropbox.com/u/9582145/3%20chord%20change.MGU

This is 4 bars in C, change key to D for 4 bars, change key to E for 2 bars

This is saved with '0' transposition (concert) - and it plays correctly - with the right key signatures showing as you step through the piece

However, after closing biab & opening it again - I now see that the key change is happening 2 bars earlier that it was when I saved 2 bars of C, 4 of D, 4 of E(odd enough).

If I now select the 'opt' button and set the transposition to '2' and look again at the notation - I see that I get something different again 2 bars of D, 4 bars of D & 4 bars of E.

... I thought that this would be quicker & simpler than throwing out the more complicated offerings of the late Mr Harry Warren.

The reason that I need to do this is to try to provide a backing track (using the bass / keys or guitar chords) and then to overlay the Tenor part for this big band arrangement - but the tenor part is in Bb. So, what I have been doing is to set transposition to '0', select the correct key & enter the chords. Then set transposition to Bb & enter the tenor part as a melody. This has worked well - except for the key changes in this piece.....