\book {
\relative c'' {
-<>\footnote
+b4-\footnote
\markup { \tiny "1." }
#'(0.5 . 0.5) #'Hairpin
\markup { 1. \justify { Goes to the first broken spanner. } }
-b4\< c d a
+ \<
+c d a
b c d a
b c d a
b c d a
b c d a\!
\once \override FootnoteSpanner #'spanner-placement = #RIGHT
-<>\footnote
+b4-\footnote
\markup { \tiny "2." }
#'(0.5 . 0.5) #'Hairpin
\markup { 2. \justify { Goes to the last broken spanner. } }
-b4\< c d a
+ \<
+c d a
b c d a
b c d a
b c d a