In this lesson we look at how you can play Dominant chord shapes all within a 5 fret box. The is part 2 of the lesson on Diatonic Chords. Click here for part 1
First let look at the notes that make up a Dominant or 7 chord.
1 - 3 - 5 - b7
So what we have to play is a Major chord and add the flat 7 not from the scale.
Remember that a Dominant chord is built from the 5th degree of a scale. so in the case of D7 the chord is derived from the G major scale G - A - B - C - D - E - F# - G
so the notes are D - F# - A - C
Another way to identify the flat 7 is to count 2 fret back from the root note. this will give you the note so in the case of the F7 chord the flat 7 is the note G.
Also if you remeber my lesson on Intervals the flat 7 is always two strings directly beneath the root note, apart from the B string where the interval is one fret higher away from the nut.