Left hand position for chords

If you are playing basic open position chords, you can usually keep your thumb a little higher on the back of the neck. Keeping your thumb higher in this case will actually make those types of chords easier to play.

If you are playing a power chords or barre chords, your thumb will need to be in the home base position, or you will never be able to reach the notes.

Page 2, Pentatonic position

Page 1, Home base left hand position

The basics of left hand position on the guitar
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The basics of left hand position on the guitar Pentatonic position Left hand position for chords on the guitar