We “Create a new topic” and are greeted with:
When we are asked to use </> we should click that button ( circled in red ) to get:
type or paste code here
…do play around with the other buttons on that header to see what they do.
Or go to the markdown page that explains how it works in this forum.
Also this post at the digikey forum is a good source for discourse forum posting.
Cheers