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: Springvals
C: arr. Ceylon Wallin
R: Waltz
M: 3/4
L: 1/8
Q: 130
K: G
"D" D>G B2 B2 | "G" BA (Ac) c2 | "D" AFDDEF | "G" G2 BG D2 |
"D" D>G B2 B2 | "G" BA (Ac) c2 | "D" AFDDEF [1 "G" G3 z D2 :| [2 "G" G3 D GB |]
|: "D" d2 c2 (B2|A) z "G" GG G2 | "D" (FA)(DF)(AF) | "G" (GB)(BD)(GB) |
"D" d2 c2 (B2|A) z "G" GG G | "D" (FA)(DF)AF | [1 "G" G3 D GB :| [2 "G" G2 |]