+ \break R1
+ \tempo "B-sharp on top"
+ \override Staff.KeySignature #'sharp-positions = #'(6 0 1 2 3 4 5)
+ \override Staff.KeyCancellation #'sharp-positions = #'(6 0 1 2 3 4 5)
+ \key cis \major R
+ \tempo "Flats throughout the staff"
+ \override Staff.KeySignature #'flat-positions = #'((-5 . 5))
+ \override Staff.KeyCancellation #'flat-positions = #'((-5 . 5))
+ \key ces \major R
+ \clef tenor
+ \key cis \major cis \break \key ces \major ces
+ \clef treble
+ \key cis \major cis \key ces \major ces