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: Rogues' March
M: 6/8
L: 1/4
K: Gmaj
N: Change: CaptainLanoesQuickMarch.abc
"G" B B/ B/c/d/ | "C" e e<e | "D" d/d/d/ d e/ | "D" d c/ B A/ |
"G" B B/ B/c/d/ | "C" e e<e | "D" d/e/f/ "G" g/d/B/ | "D" A3/2 "G" G3/2 :|
"Em" g3/2 "D" f3/2 | "C" e3/2 "D" d3/2 |\
"Em" g3/2 "D" f3/2 | "C" e3/2 "D" d c/ |
"G" B B/ B/c/d/ | "C" e e<e | "D" d/e/f/ "G" g/d/B/ | "D" A3/2 "G" G3/2 :|