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: Country Gardens
M: C
A: Fieldtown
L: 1/8
Q: 1/4=150
P: A(A2(BA)2)4
K: G
P: A
"G" g2 g>f "C" e2 e2 | "G" d>ed>c B>BB>c | "G" d2 G2 "D7" A>cc>A |\
"G" B z (3ABA G4 |]
P: B
d2 |\
"G" g2 g2 "D7" f>e d2 | "C" g2 g2 "D7" f/g/f/e/ d2 |\
"G" g2 g>f "A7" e2 a2 | "G" f>gf>e "D7" d>de>f |
"G" g2 g>f "C" e2 e2 | "G" d>ed>c B>BB>c | "G" d2 G2 "D7" A>Bc>A |\
"G" B2 (3ABA G4 |]