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: Winster Gallop, The
M: C
N: Change: SalmonTails.abc
L: 1/4
Q: 240
R: polka
K: Gmaj
"G" GB GB | GB d2 | "D7" A>c BA | "G" GB d2 |
"C" c e g e | "G" d B d2 | "D7" AB/c/ BA | "G" G2 G2 :|
|: "G" {c/d/} gf ed | gf ed | gf ed | "D7" cB A2 |
"D7" fe d2 | fe d2 | d2 A>c | "G" B G G2 :|