Key signatures and chord symbols are doors to facility at the keyboard – doors too often locked by insufficient understanding. This guide unlocks them with clear and simple explanations, additionally providing: major and minor scales • guidelines for scale fingering • chord charts which include major, minor, augmented, seventh, ninth, eleventh, major seventh, major ninth, minor seventh, sixth, minor sixth and diminished chords in all positions • formulas and symbols for altered chords – a simplified approach to forming complex chords • a glossary of music terms and chord spelling chart.