The content of a Web site is created to be best viewed in a range of display sizes or screen resolutions. The display size maximum is determined by your monitor’s maximum display area (by maximizing your browser window) and the display size minimum is user controlled by resizing the window to be smaller then the maximum area allowed.
By viewing a Web site at or above the recommended display size or screen resolution all the Web site content can be seen without scrolling left to right. Each Web site will vary with their recommended display size or screen resolution, but the most recommended browser display size is 1024 width by 768 height (1024 x 768).
Your monitor’s display size, sometimes referred to as the desktop area is a setting controlled by your Operating System. Please refer to your Operating System documentation on how to determine and change your display size.