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: Fiery Clock Face, The
M: 6/8
L: 1/8
Q: 160
K: Gmaj
d | "G" g2 g G2 A | B2 c d2 e | "F" =f2 f A2 B | c2 d e2 ^f |
    "G" g2 g G2 A | B2 c d2 d | "C" efg "D7" a2 f | "G" g3 g2 :|
A | "G" B2 B GAB | "Am" c2 B A2 G | "D7" F2 E D2 E | F2 G A2 ^A |
    "G" B2 B GAB | "Am" c2 B A2 G | "D7" FED E2 F | "G" G3 G2 :|