To create a numbered or bulleted list, put the cursor where you want to add the list, and click the appropriate button (i.e. "ordered" or "unordered" list). If you click the drop-down arrow next to the button, you will be offered a choice of list types (for example alphabetic or Roman numerals rather than simple numeric ordering, and different bullet characters).
Enter content for the first list item, then click the ENTER button to move on to the next item. At this point you can click the TAB button, or the Increase indent icon, to start a list-within-a-list. After entering items for this inner list, click SHIFT-TAB or Decrease indent to go back to the previous level of indentation.
At any time, you can use the Oredered list or Unordered list button to change the type of list and/or the bullet or numbering being used. This will apply to all the items at the current level in the current list.