OK, I hit something on the key board that I shouldn't have.   Now about half my tool bar is gone, no back button, no drop down screen, etc.  It won't even let me type in website name, to switch to another site, I have to go through a search engine.

So, how do I get this back?   I''m guessing it's using one of the top "F" keys, but which?   I don't want to make it even worse than it is.   Thanks.