CAUTION notes on storylets

As I’ve played through various StoryNexus games, I’ve noticed some cards that have warnings on them, usually in large red italic font, placed one line below the storylet’s description. Typically they are used to caution the player of serious consequences (character may die, going forward is a point of no return, etc). These strike me as a really useful tool, but I have no idea how to add one to my storylet. Anything I type into the description block just shows up as one solid paragraph, with no line breaks or font changes. I’m sure I’m missing something obvious, but would someone mind helping out the slow guy here? Thanks!

Put square brackets around help text. If you go to the help menu there is a formatting guide.

Ah, so it’s html. I missed that when reading through the guide, thank you very much for the help!