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: Moll in the Wad
M: 6/8
L: 1/8
K: Gmaj
"G" BAB D2 F | "C" E2 F G2 A | "Em" BAB G2 B | "D" AFD D2 c |
"G" BAB G2 F | "C" E2 F G2 A | "Em" BAB dcB | "D" AFD D3 :|
"G" BGB "D" d2 c | "G" BGB "D" D2 d2 c | "G" BGB dcB | "D" AFD D3 |
"G" BGB "D" d2 c | "G" BGB "D" def | "G" gfe dcB | "D" AFD D3 :|