-\version "1.9.8"
+\version "2.3.4"
\header {
texidoc = "The layout of the major 7 can be tuned with
@code{majorSevenSymbol}."
\score {\context ChordNames \chords {
c:7+
- \property ChordNames.majorSevenSymbol = \markup { "j7" }
+ \set majorSevenSymbol = \markup { "j7" }
c:7+ }
}