I often see comments on HN with references added at the end, but am unclear how they did it. I would guess its some sort of MultiMarkdown, but how? Are people writing in a text editor in MMD and copy pasting it here, or is there a browser extension everybody uses I don't know about?
👤 tlb Accepted Answer ✓
You just type them with square brackets, like this [0]. There's no feature [1] involved.
Just type it out. There's no magic. You can put them inline (which I prefer) but if they're in the middle rather than at the end of a paragraph it's harder to read.