If not already. At least I couldn't find one. I think it would be a good added feature that if there are no guitar notes in the song then there would even be a menu where you could see that chord how it is taken on the guitar.

I mean, a chord chart of all the chords could be a good addition.

Try Ctrl+Shift+G to open the Guitar Fretboard window. When the chord sheet says a "C" is playing you will see the individual notes for a "C" chord on the fretboard.

Also check out the +++ Guitar Chord Dictionary +++

The Guitar Chord Dictionary… that program doesn't seem to be part of the program? A separate program for an additional fee? Will that work on the Mac version?

The Chord Dictionary is only available for Windows. It is an add-on and is not part of the Band-in-a-Box program.