Guitar chords in the key of A:
Chord Amaj7 notes: A, E, G#, C# and E. You should not play the 6th string.
The guitar strings 5(A) and 1(E) are left open.
A major 7th guitar chord's alternative names: AM7, Amaj7.
1(A), 3(C#/Db), 5(E), 7(G#/Ab).