The current implementation in `InlineMarkupTogglePrivate::InlineMarkupTogglePrivate()` only supports the asterisk for formatting marks inserted using Ctrl+I and Ctrl+B. For my personal style, I prefer using a single underscore for italics and a double asterisk for bold; that way the different formatting styles are visually distinct. This is a feature in Zettlr, which was useful when I tried it. I don't know if a link is going to work here, but I can provide one if needed. I think it'd be really cool if there were an option to set these both independently; something in the preferences dialog that lets you pick: Emphasis (italics) markup character: `(•) * ( ) _` Strong (bold) markup sequence: `(•) ** ( ) __` And then the markup toggle can pull from that setting to determine the correct character to use. SOFTWARE/OS VERSIONS Windows: 2.1.6 Qt Version: 5.15.2 (I include the version here, but I'm reading the current development sources and seeing no change.)