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: Balance the Straw
A: Fieldtown
M: 6/8
L: 1/8
Q: 120
K: G
P: A
D |: "G" G2 B BAB | "C" c2 A ABc | "D7" ded cBA |\
  [1 "G" B2 A G2 D :| [2 "G" B2 A GBc ||
P: B
|: "G" d2 d d2 B | c2 c "D7" B2 A | "G" ded BGB |\
   "D7" c2 B A2 D | "G" G2 B BAB |
   "C" c2 A ABc | "D7" ded cBA | [1 "G" B2 A GBc :| [2 "G" B2 A G3 |]