1.
Place your index finger on the first edge of the B-string.
2.
Place your middle finger on the other edge of the G-string.
3. Place your ring finger on the second row of the high E-string.
4.
Strum each string of the chord except the low E and A strings. Take the time to make sure the notes are all played clearly. If some of the notes are not clear, make sure you use enough pressure and that your finger is close enough to the metal bar on the screen. Then you should get a nice clean sound.
h4> Tips and Warnings
Open guitar chords are played mainly on the guitar’s first three guitars. They are called open because strings that are not corroded (printed on a fingerprint) are ‘open.’
The D dominant seventh (D7) open chords are easy to learn. It only has three notes that need to be fretted.
Source:danspela.com