OK...but it's not my desktop picture that I'm referring to. In the picture, I have FF open and you can see that there are 2 grey bars on the 2 sides. That's what I'm talking about...how to eliminate those grey bars and have the picture fill that area.
On my laptop, which I'm on right now, it's perfectly normal.....although the LED screen is 15.6" screen. Would a monitor's screen size have any bearing on that?