Dm6 is a minor sixth chord made of 4 notes: D, F, A, B. It sounds bittersweet, a little mysterious, and you hear it in gypsy jazz, film music and minor-key endings. It is the i chord of D minor and turns up in 5 other keys.
The library above opens on Dm6 with 14 shapes up and down the neck, starting with hand-checked ones. Tap a shape to hear it, or play it one string at a time.