B7 shapes on mandolin

B7 is B, D♯, F♯ and A — the 1, 3, 5 and ♭7 of B. On the mandolin there are 21 shapes to walk with ‹ ›; tap any note on the mandolin to pick the shape that holds it. Major triad plus a flat 7th — tense and bluesy About the dominant 7th →

Also written Bdom7, B dominant 7, B dominant seventh, Bdominant and B dom 7.