A major 7th chord is created by adding a 7th degree to any major chord. For example, a Cmaj7 chord contains the notes C, E, G and B (1, 3, 5 and 7). Here are some common open major 7th chord shapes.
Cmaj7

Dmaj7

Emaj7

Fmaj7

F#maj7

Gmaj7

Bmaj7

Dbmaj7

Ebmaj7

Abmaj7

Amaj7

Bbmaj7
