I'm training a music that is most on the G Major scale.. But then there's a B chord. As B is not on the G Major scale, how can I refer to it when I'm writing the chord progression?
My guess is that I should just write a III instead of a iii that would be the normal case. But what about when I must refer to an F? G Maior scale only has a F#m7/5-, how can I refer to an F?