About the Bbmaj7 chord
To play Bb major 7th, use the first shape above. Place your index finger on the 1st fret of the E string, your middle finger on the 2nd fret of the C string, and your ring finger on the 3rd fret of the G string. Leave the A string open. Strum all four strings and check that each one rings cleanly.
Root
Bb
Quality
Major 7th
Notes
Bb · D · F · A
How the Bbmaj7 chord works
Bb
Root(1)
The home note. It gives the chord its name.
D
Major third(3)
The major-third interval that establishes the chord's major base.
F
Perfect fifth(5)
Adds strength and stability.
A
Major seventh(7)
Adds a major seventh above the root.