Progressions in G — 5-String Banjo

Every chord the key of G owns, charted on gDGBD and ready to pick.

G major harmonises to G – Am – Bm – C – D – Em – F#°; G minor to Gm – A° – A# – Cm – Dm – D# – F. Each chord links to its 5-String Banjo voicings, so a tune in G becomes a short list of shapes before the first repeat.

Then check the key against the short g: some keys let it ring free through every change, and some make it a note you have to work around. Knowing which is which is most of what "playing in a good key" means here.