I don't know how to explain it. Take a page from a book and cut 2 inches off the top and make the margins wider. You lost 2 inches of words. The pic etc fills the screen but it is simply stretched. Well on the posting page there's a big blank area beside the posting box.
Is this just when using your browser or is your desk top also affected?
I have that blank area beside the posting box too, but when I play movies or DVDs, or Youtube videos, I can choose a full screen, which is wonderful. On the rest of FR, I have no blank areas, and everything is larger.