The chord diagrams below are moveable shapes, which means that you just slide the chord shape up or down the neck to change the name of the chord. The most important thing to know when using any moveable chord shape, is knowing which string the Tonic ( T ) is on.
The Tonic is the note that the chord takes its name from and is indicated with the letter T directly below the string in the diagrams below. For example, the first major chord below has a T under the 6th string ( E ), so all you need to know are the notes on the 6th string and move the whole chord shape up or down the neck to the fret with the desired note under the first finger. If you wanted to play an A Major chord you would slide the chord with the Tonic on the 6th string so that your first finger ( Bar ) is on the 5th fret.
The first finger, or Bar goes right across the whole six strings. It saves a lot of time if you learn the names of the notes on both the 5th and 6th strings first, or at least learn the notes on the 3rd, 5th, 7th, 8th and 10th frets.
|String||Fret 3||Fret 5||Fret 7||Fret 8||Fret 10|
|String 6 (E)||G||A||B||C||D|
|String 5 (A)||C||D||E||F||G|