3 \header { texidoc = "Key signatures can be set per pitch
4 individually. This can be done by setting @code{Staff.keySignature}
11 \property Staff.keySignature = #'(((1 . 2) . 1) ((0 . 3) . -1))
13 \property Staff.keySignature = #'(((1 . 2) . -1) ((0 . 4) . 2))