Here is an image of the editor icons as you see them in the Frontend of the web site (i.e. here). There are a few extra features when you use the same editor in the Administrative interface. You can also download a PDF of this image at the end of this article in case you would like to print it out. You need to click the "All Pages" link and scroll to the bottom of the article.
Well, if you get this far, you have done very well.