The sitting position is best to use when you are first learning to play the guitar.
When playing sitting down:
The main aim is to be comfortable and have easy access to the guitar fretboard. A music stand will also be helpful.
The standing position is particularly good for playing electric guitar (but can also be used with an acoustic guitar) and is essential if you plan to play in a band. Once you are comfortable with this position, try moving in time with the music as you play.
When playing standing up:
The correct position for the right arm is illustrated in the photos. Notice that the forearm rests on the upper edge of the guitar, just below the elbow. Be careful not to have the elbow hanging over the face of the guitar. Do not move your strumming hand too far towards the fretboard.
If you are playing an acoustic guitar, pick the strings over the sound hole as this makes the best sound. When playing single notes, you can support your right hand by placing the third and fourth fingers on the body of the guitar, as shown in the accompanying photo.
If you are playing an electric guitar, pick the strings between the pickups. As an alternative to supporting your hand by placing your fingers on the guitar, some players use a closed-hand position, as shown in the accompanying photo.
If you are strumming a chord, do not support your right hand with your fingers on the body of the guitar but still rest your forearm on the upper edge of the guitar.
The right hand is used to play the strings by plucking them with a pick. A pick is a piece of plastic shaped like a tear drop or triangle. Hold the pick lightly between your thumb and first finger and use the tip of the pick to play the string.
The correct placement of the left hand is illustrated in photos A and C. Be careful not to allow the thumb to hang too far over the top of the neck (photo B), or to let it run parallel along the back of the neck (photo D).
When playing notes and chords your fingers should be on their tips and placed just left of the frets (not on top of them) as shown in the picture.