Thanks for pointing out YALML (lightweight markup language) for my collection! With regard to my comment below, I note that Org does support a Centered mode for

Thanks for pointing out YALML (lightweight markup language) for my collection! With regard to my comment below, I note that Org does support a Centered mode for paragraphs and a Verse mode in which line breaks are preserved, although it does not appear to allow control of the indention of those lines.