This is great, as are all your tutorials.  I do have one question that maybe you can help me with though.  I noticed in this video, as in some of your other videos, that in edit mode, you switch very quickly from vertex, to edge, to face elements without any menus, and without clicking on the UI buttons.  So how are you doing that?  I know you probably have them set to a keyboard shortcut somehow, but how did you do it?  I tried right-clicking on the icon buttons in the UI and chose edit source, but I don't see where they can be set to a shortcut.