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: A La Mode De France
T: Nonesuch
N: Change: RuftyTufty.abc
M: C
L: 1/4
Q: 160
K: Gmaj
P: A
"D" d | "D" d B c d | "G" B>A G d | "G" d B c d | "G" B3 :|
P: B
|: "G" B | "D" A F G A | "G" B>A G B | "D" A F G A | "G" B3 B |
"D" A F G A | "G" B>A G d | "D" d B c d | "G" B3 :|