Does anyone know how the Lyric command can be used on top of the staff? (so that guitar chords can be added)
Set Alignment to Top in the Lyric configuration.
You might also consider placing your guitar chords as "text" rather than "lyrics." Text can be placed nearly anywhere, and you don't have to use the same font as the one you are using for lyrics.
If you are looking for some fingerboard diagrams, search the Internet for free fonts called "Frets" A,B, and C.
You can find the frets fonts there (http://www.dingbatpages.com/arts/frets.zip). Refer to another JoeMusic's post : https://forum.noteworthycomposer.com/?topic=1209.msg8143#msg8143 :)
hope this helps!