12 keys · key signatures · relative minors
Built as a memo rather than a table: the thing worth hanging it up for reads across the room, with the full reference in smaller type below it.
Three sizes in one archive — from a sheet on the fridge to a poster on the wall.
Clockwise goes up a fifth, counter-clockwise down. Neighbouring keys differ by one accidental.
Flats: the second-to-last flat names the key. Three flats — B, E, A — second-to-last is E, so E-flat major.
Sharps: take the last sharp and go up a semitone. Last is G-sharp, so A major.
One exception: F major, the single flat. That one you simply remember.
Why the numbers can be trusted. Every countable number here is computed from data rather than typed in, and the sheet must pass 8 independent checks before it is allowed to build — how many items there are, the order they come in, and the claim in the highlighted box itself. If one fails, there is no file.
two shapes, twelve chords each
one coil or two · six builds · where it sits along the string, and how high above it
15 chords every beginner starts with · standard tuning E A D G B e
standard tuning E A D G B e · first twelve frets