To create an unordered list, select the text for the first bullet and click the unordered list icon. Hit enter to add additional bullets. When you are done, hit enter/return until there is no longer a bullet. 

To create an ordered list use the same steps above but click the ordered list icon.

Lists can also be nested. To do this, select the bullet you want nested and click the indent icon

Use the decrease indent icon to remove the nested list.