That’s exactly what I was looking for. I was assuming it was a separate property, not one tied to the event-concept. I’m actually already using the event-concept (which is how I rendered the colored events). Anyway, I posted a question on StackOverflow, too, (https://stackoverflow.com/questions/70600250/how-to-specify-symbol-character-in-os-signpost-point-schema/70659365#70659365) and have reposted your answer there. But obviously, if you’d rather post your own answer there to get the due credit, I’m happy to delete my answer and instead award you the bounty points! I’m happy either way.