Render tune title, subtitle and composer in Latex/HTML and not in the image. This way the titles remains a constant size even if the image needs to be scaled. And we have that text appearance under our control. I can't find a way of switching off the tune title in abcm2ps, and have worked around by setting the title format to Y0. Y is not a defined ABC header and is not found in any Dottes tune.

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 :|