The top half of @cpradio’s post is how he did it. Copy the stuff in the gray box right into a reply, and that’s how you can do it.
Essentially, to create a bullet, make sure there is a blank line above if not the first line, then type a dash, a space, then the line of text. To create an indented bullet, after a regular bullet, type a space, then dash, then space, then text.
Hope this helps!