I am entering chord charts to use with jazz guitar study. I occasionally run across a chord BIAB will not accept. For example, I need to enter BbMaj7(#11) for the most recent work. This form is not in the Chord Builder or any other list I can find.

Has anyone found a work-around for this one? (i.e. perhaps Maj7b5 produces the same result?).

Thanks for any help!