Song lyrics are almost always subtitled. As a general rule of thumb, the lyrics should be verbatim, especially in the case of well-known songs, which should never be edited.
But there are some exceptions where it may be best to leave the lyrics unsubtitled:
- You consider the visual information on the screen to be more plot pertinent than the song lyrics.
- Short snippets of a song are interspersed with any kind of speech and this would lead to confusion for the viewer.
Appearance of lyrics: Generally, song lyrics should be enclosed with a music note (♪) followed by a space at the beginning and the end of each subtitle and they should be in italics.
Keep punctuation in songs to a minimum, with punctuation only within lines (when grammatically necessary) and not at the end of lines. You should, however, avoid full stops in the middle of otherwise unpunctuated lines.
Use an uppercase letter at the beginning of each line.
♪ A falling star fell from your heart
And landed in my eyes ♪
Similarly, if the song lyrics do not finish at the end of the song, put three dots at the end of the line to show that the song continues in the background or is interrupted.
Synching of lyrics: The timing of song lyrics will not always follow the conventional timings for speech subtitles. They should be kept closely in sync with the soundtrack.