Wow, you use keys so little that you dont know the actionbars can be keybinded? Heh... sorry I don't mean to be a meanie.

Anyways, if you hit ESC in game and goto the Keybinding menu you'll see places for "Bottom Left" "Bottom Right" "Top Left" .... etc for Action Bars.

When you bind it to a key, that key appears as text over the actionbar box, so its easy to figure out.