I am really sorry to have hi-jacked this thread, apologies to tbac·ck123…
I went on with my lyrics editor window and I find I cannot insert non breaking spaces, so useful when dealing with opera. I know I could use the _ thing, but it’s never used on opera scores and I really don’t like it. Retrospectively, I see that these unbreakable spaces appear as · points (alt-shift-f on my mac) in the editor. But if I input them this way, they do appear as · in the score, and not as unbreakable spaces. Is there a key combination to achieve that (two or more syllables with an unbreakable space in between) in the lyrics editor window already implemented ? If not, I might request that, or a slight change of behavior. In the meantime, I suppose I’ll use the editor and then go back to the problematic notes and correct them one by one.