Watch the Extended D: First Position online guitar lesson by Jimmy Heffernan from Dobro Handbook

Now let's extend the scale to include all of the D major scale notes up to the 5th fret.

You'll find that all of these additional notes will make you very happy when you're playing over the 4, 5 and 6 minor chords as well as 2 minor and 3 minor. From there you can move up the neck using the major scale map we learned in G.