As far as I can tell, short of writing tagged sections, there's no way to easily unfold only percents, while leaving voltas intact. Would this be a desirable behavior for Lilypond to have?
My particular use case is transcribing band music. The inner parts of marches often use percent repeats in the parts I'm working with. I would like to be able to leave them as percents in the parts, but have them unfolded in the score, so the conductor doesn't have to go hunting for the first measure if she's checking notes.
Thanks.