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:Three Around Three
S:Nick Barber
M:4/4
L:1/8
Q:160
Z:Steve Mansfield 2002
K:G
"G" d2BA G2G2 | "D" A2BA "G" G2D2 | "C" EDEF "G" G2AB | "D" c2B2 B2A2 |
"G" d2BA G2G2 | "D" A2BA "G" G2D2 | "C" EDEF "G" G2Ac | "G" B2 "D" A2 "G" G4 :|
|: "D" d2 ef "G" gfed | "C" e2e2 e2>e2 | "G" d2B2B2AG | "D" FGAB A4 |
   "D" d2ef "G" gfed | "C" e2e2e2d2 | "C" ef g2 "D" fgaf | "G" g4 g4 :|