About the Bm7 chord
To play B minor 7th, use the first shape above. Place your index finger on the 2nd fret of the C string, your middle finger on the 2nd fret of the E string, and your pinky finger on the 4th fret of the G string. Leave the A string open. Strum all four strings and check that each one rings cleanly.
Root
B
Quality
Minor 7th
Notes
B · D · F# · A
How the Bm7 chord works
B
Root(1)
The home note. It gives the chord its name.
D
Minor third(♭3)
The defining minor interval above the root.
F#
Perfect fifth(5)
Adds strength and stability.
A
Minor seventh(♭7)
Adds the defining minor-seventh color.