I'm not new to music or computers but this program just stumps me. i want to create a jazz guitar backing track in Bflat. I cannot for the life of me figure out how to enter a Bflat7/13 chord. the chord builder doesn't seem to list one and If I choose the 7 it wont let me choose the 13 in addition. when I try to enter it from the keyboard iget nowhere as well. I looked in the index under entering chords and all it gives is how to use a midi keyboard.
Q. where can I find a list of keyboard entry conventions, for ex. how to get a Bflat [ what key makes 'flat'] or if I do a 7 13 does the 13 go in parenthesis?

overhwhelmed in indiana, Kaeote