Above the fold is also used in website design (along with "above the scroll") to refer to the portion of the webpage that is visible without scrolling. As screen sizes vary drastically there is no set definition for the number of pixels that define the fold. This is because different screen resolutions will show different portions of the website without scrolling. Further complicating matters, many websites adjust their layout based on the size of the browser window, such that the fold is not a static feature of the page.