Watch the A Chord Family online guitar lesson by Rich Maloof from Acoustic Guitar For Beginners

By making very small changes to chord fingerings - lift a finger here, add a finger there - you can quickly multiply the number of left-hand options available.
You can look for new chords based on all the shapes learned in this series. For starters, we look at chords in the family of A. Consider that you might need to reconfigure how your left hand is fingering an A, depending on what changes you want to make.
In case you come across the "A" family chords in sheet music or tab you find online, here are the chords we've covered - all with one-note changes to the simple A major form.
A major (A)
A minor (Am)
A minor 7th (Am7)
A suspended 4th (Asus4)
A suspended 2nd (Asus2)
A dominant 7th (A7)
A7 sus4