Underscores can be used in two helpful manners in lyrics.
- A "space, underscore" sequence will move a syllable forward one note. This can be helpful in multiple lyric songs with multiple endings.
- Sometimes a two-syllable word is desired on each note of a slurred or tied note. Hyphens will cause the first syllable to be carried over the entirety of the slurred/tied notes. However, underscores (without spaces) will divide the syllables appropriately.