When creating a Hymn book, RAB will create a number list menu and a song tile menu. But you can also include other text items in the song title list.
Songbook add first line and chorus first line to index
\id BAT
\toc2 Batoli Betiw
\c 1
\s Ala Tanu! Aleluya!
\q An k'Ala tanu
\q Ala Denkɛ ko la,
\q O sara ka kunun
\q Ka ɲɛnamaya.
\b
\q2 Ala Tanu! Aleluya!
\q2 Ala Tanu! Amiina!
\q2 Ala Tanu! Aleluya!
\q2 Yesu bɛ na tun.
Add lines:
\zs An k'Ala tanu
\zs Ala Tanu! Aleluya!
So your get:
\id BAT
\toc2 Batoli Betiw
\c 1
\s Ala Tanu! Aleluya!
\zs An k'Ala tanu
\zs Ala Tanu! Aleluya!
\q An k'Ala tanu
\q Ala Denkɛ ko la,
\q O sara ka kunun
\q Ka ɲɛnamaya.
\b
\q2 Ala Tanu! Aleluya!
\q2 Ala Tanu! Amiina!
\q2 Ala Tanu! Aleluya!
\q2 Yesu bɛ na tun.
Equivalent to the first line of the first verse and the first line of the chorus.
The \zs lines are not shown in the app but are included in the song title list.