I added highlight colors to Les Norton's Tau keyboard layout diagram...
I added highlight colors to Les Norton's Tau keyboard layout diagram ( https://plus.google.com/105613129315034911815/posts/FTZB51rS1mr ) in order to better visualize the layout of basic chord patterns. On the left, red highlights C-major, green highlights G-major, and orange highlights F-major. On the right, red highlights A-minor, green E-minor, and orange D-minor. F-major and D-minor have different shapes from the others because they cross the 4° block boundaries.