Hi Musicdiver, I believe you're getting a bit confused re resposive site here. It's quite convoluted so I won't go into it here.

The polar_website has a set page width (960px) in which the content sits. However the mountain range image has Stretch Properties applied allowing the image to fill the browser width, which adjusts as you scale your browser window up/down. But notice that the remainder of the content remains in the 960 px page width.