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: Dogs of War
C: Paul Ferrett
M: C
L: 1/8
K: G
D |: "Em" E2>G2 "D" FEDF | "Em" G2 z2 "D" A4 |\
     "Em" GF E2 "D" DEFA | "Em" G2 E2 E2 D2 :|
|: "G" B2 GB "D" A2 FA | "G" GFED "D" EFGA |\
    "G" B2 GB "D" A2 FA | "G" GFED "Em" E4 |
    "G" B2 GB "D" A2 FA | "Em" G2 z2 "D" A4 |\
   "Em" GF E2 "D" DEFA | "Em" G2 E2 E4 :|