Watch the Hold Your Position! online guitar lesson by Brad Carlton from Chord Studies: Power Chords Vol. 1
Here we are gonna be playing some power chords while staying in third position. Our first voicing is G5 and we've got root, skip the fourth string, five, root. For the F5 instead of shifting down a whole step we are going to achieve the same notes while staying in position. Then you go back to G5, and staying in third position use finger four to grab the B♭5.