The D Minor 7 Chord (also known as Dm7,D Minor 7th) is found by locating the 1, b3, 5, b7 steps of the D Major Scale: D, E, F#, G, A, B, C#, or the notes D, F, A and C. The “b3” symbol translates to “Flattened 3rd” , which means we simply lower the 3rd step of the D Major Scale (F#) a 1/2 step to an “F”. The “b7” symbol translates to “Flattened 7th” , which means we simply lower the 7th step of the D Major Scale (C#) a 1/2 step to a “C”.
D Minor 7 Chord notes: D, F, A and C
Here is a key that will help you read the chart:
Everything on the above chart should be self explanatory, except for the last three in the third column. They may need a bit of explaining. The O, or open symbol, simply means that you do not press down on any notes on that string. The X means you do not strum that particular string. The Barre symbol means you need to barre that particular fret. When you barre a fret you are pressing down on multiple strings at the same time with one finger.
