Guitar Essentials Poster by Phil Black will get you started! Three of the most common keys are the focus of this graphically stimulating poster; the keys of C, G & D major. Each key contains three basic chords as well as "power" chords. Each key has a major scale and a minor pentatonic scale to help you learn to improvise. The bottom of the poster displays a series of exercises that will have you jamming in no time. Simply hang this poster in your music studio, practice room or perhaps on your bedroom wall. Any visible spot where "at-a-glance" help is all you need. 11" x 17" poster.