I'm not sure if you are supposed to do it, but I make judicious use of my thumb for fretting on the g string when playing.
I find it useful when transitioning from A to F#m, F to Dm, and playing Dsus2 or Dsus4. You can also use it to play the G and G7 shape all the way up the neck. The following diagram shows some of the ways I use my thumb to finger my chords:
Happy strumming!
I find it useful when transitioning from A to F#m, F to Dm, and playing Dsus2 or Dsus4. You can also use it to play the G and G7 shape all the way up the neck. The following diagram shows some of the ways I use my thumb to finger my chords:
Happy strumming!