Answering my own question, apparently they need two line feeds between each text line.
On Tuesday, July 27, 2021 at 8:52:09 PM UTC-7 Mark S. wrote: > I was trying the split feature with alt+enter. The dialog asks if I want > to split the text into separate tiddlers, but it doesn't actually perform > the split. Is there any special way that I need to format the text before > attempting the split? > > > -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/77206f2e-ab7c-461f-aadf-761b12667f8bn%40googlegroups.com.

