I recently updated to Lion. Suddenly my screen will get big. How do I get it back to normal size?

Question

I have tried esc, command + control + F, holding down the control key and scrolling with the mouse, tapping on the mouse, and making a pinching motion on the mouse.  How do I get my screen back to normal size?

Answer 1

Of course, it's not doing it now.  But when it happens, it's like the whole view gets bigger and I then can only see a small part of the view.  Which is what you described in the first sentence of your message.  I followed your directions and zoom is already marked as being off.  But, as I said, it's not doing it right now.
I guess I really don't understand your second comment about resolution. 
And I guess I want to know what's causing it to do this.  I think there's something in Lion that it you tap on the mouse, it makes the view larger, but I am not conscious of tapping on the mouse.  And, even so, there ought to be a way to return to normal without having to go the system preferences each time.  Right?
P.S. I love your kitty picture.