Straffo is correct. it is the home key. When ever you mess up your settings just hit it to reset default view and hit f10 to reset it that view.
You can also use macros to move your head fwd to a point just about outside the drivers view port, by using the arrow keys. F1 to enter macro mode, make the change, f10 to save it. It works very well when using the hat (hat pushed fwd and set).