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: 15
T:Lanigan's Ball
R:Jig
H:Seamus Quinn
M:6/8
L:1/8
Q:3/8=120
K:G
|: "Em" E2E G2A|B2A Bcd| "D" D2D F2G|ABA AFD|
"Em" E2E G2A|B2A Bcd|"Bm" eBB B2A| "Em" BEE E3:|
"Em" e2f g2e|fag fed| "D" e2f gfe|fdB Bcd|
"Em" e2f g2e|fag fed| "Bm" edB cBA|[1 "Em" BGE EDE:|[2 "Em" BGE E3|]