Learn to Play in Dropped-D Tuning
D-E-EmKeep in mind that any chords played on the top four or five strings (C, A, Am, Bm, etc.) in standard tuning don’t need any modification at all in dropped D. Any chords that incorporate notes on the sixth string, however, will need to be modified slightly—you have to raise the notes on the sixth string up two frets. For example, the standard tuning Em chord on the left becomes the chord on the right in dropped-D.
Once you’ve arrived at dropped-D tuning, indulge yourself with the huge D chord you now have at your disposal. It’s fingered exactly the same as a standard-tuning D chord, but you can strum all six strings to get a nice low bass.
Excerpted From: Alternate Tunings Guitar Essentials