The purpose of these charts are to provide the musician with a quick, at a glance guide for learning Scales / Modes / Chord Symbols within each of the 12 Keys. Blue represents Major Key Tonic and Red Represents the relative Minor Key Tonic. At a Glance Transposition, great for capo players, and Roman Numerals for fundamental harmonic applications. The first guide is the diatonic Major and Minor family. The second guide is the Harmonic minor family, and the third is the Melodic (Jazz) minor family.