When you use Safari in Lion’s full-screen mode, some web pages can look stretched out. Many sites aren’t designed for the full width of your monitor, but you can resize a web page’s width while you’re in full-screen mode. To do so, move your mouse all the way to the left or right edge of the page. (This can be tricky if you have a second monitor; you’ll need to make sure that you get the cursor to the edge of the full-screen page without letting the cursor jump to your adjacent screen.) Once the cursor changes from the traditional arrow to a horizontal resizing pointer, click and drag to shrink the page’s width. The new width will be set only for the current tab in the current window – every other tab and window will retain its current width.