Move Change: notice closer to the bottom of the tune graphic. I was using \begin{center}..\end{center} to centre the tune graphic, followed by the change notice, if any. But this leaves a paragraph gap after the center section and hence a gap between tune graphic and change notice. Change to use figures to position the graphic, include the change notice as a caption, and use {\centering} around the image to centre just the image.

X: 1
T: Railway, The
M: 6/8
L: 1/8
K: Gmaj
D | "G" G2 G GBd | g2 d d2 d | "Am" e2 d c2 B | "D7" ABA FED |
    "G" G2 G GBd | g2 d d2 d | "C" edc "G" BAG | "D7" A3 "G" G2 :|
|: d | "G" b2 b b2 a | g2 g g2 d | "C" e2 d efg | "D" a2 g fed |
       "G" b2 b b2 a | g2 g g2 d | "C" efg "D" agf | "G" g3-g2 :|