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: Jenny Lind
M: C
K: D
L: 1/4
P: A
"D" F A "G" G B | "D" A f f/e/ f | "A7" G e e/d/ e |\
"D" F A d A/G/ | "D" F A "G" G B |
"D" A f f/e/ f | "A7" g c c/g/f/e/ | [1 "D" d3 A/G/ :| [2 "D" d3 ef |
K: G
P: B
"C" g f e/g/f/e/ | "G" d B B/A/ B | "D7" c A A/G/ A |\
"G" B A G e/f/ | "C" g f e/g/f/e/ |
"G" d B B/A/ B | "D7" c A A/c/B/A/ | [1 "G" G B G e/f/ :| [2 "G" G3 A/G/ |]