Markdown option for italic: underscore vs asterisk

Didn’t there used to be a setting somewhere for rendering both underscore and single asterisk as italic? I feel like I saw it somewhere about a month ago but now I can’t find it in 0.8.7.

What I really want is to use CSS to have underscore do nothing and single asterisk to render as italic, but I think I selected this strong=italic option I’m remembering and now the CSS doesn’t have any effect. How can I undo strong=italic?

Related: Option to change the default markdown for Italic - Archive - Logseq