To create a numbered (or bulleted) list:
  1. Click on the little numbered (or bulleted, if you prefer) list icon. It's in the upper right corner of compose window.
  2. Type your first listed item in the resulting popup window; then click "okay"
  3. A new (blank) popup window will display; type your second listed item, then click "okay"
  4. Another new (blank) popup window will display; type your third listed item, then click "okay" (etc.)
  5. When you have no more items to list, click cancel (or okay, without typing anything in the window).
Voila! A numbered list