On a computer that is provided with a desktop kind of user interface, wallpaper is the background pattern or picture against which desktop menus, icons, and other elements are displayed and moved around. Wallpaper is commonly used in Microsoft Windows, Macintosh Mac OS, Linux, and in other operating systems as well. The wallpaper always stays in the background, and all work is done on top of the wallpaper.
The best wallpaper size for your monitor will ideally match the ‘native’ resolution of your computer’s screen. A perfect wallpaper will fill full desktop without distortion or any empty background. It will retain its original sharpness Typically, a wallpaper image may be centered, stretched, or tiled. When a proper wallpaper image is centered, it will be placed in the middle of the desktop and will occupy full size of your monitor. If the wallpaper is not of perfect size, it will be placed in the middle of the desktop and be surrounded by a solid color. When one stretches a small size wallpaper to completely fill the desktop often it distorts if the proportion of the wallpaper is not matching with your desktop resolution. Stretching also reduces the sharpness of the wallpaper and thereby reduces the quality. When an image is stretched, it is stretched to cover all of the desktop. Only certain images can be stretched or they look distorted. An image that is tiled is placed on the desktop much like tiles are placed on a tiled floor. Tiling is used only for patterns & not for photos.
To find your screen’s current resolution: Windows Vista Users: Right-click on your desktop and select “Personlize”. Then click the “Display Settings” icon. This will bring you to your main display options, which will show you what resolution your monitor is currently set to. You may also change your monitor’s resolution from here if required. Windows XP Users: Right-click on your desktop and select “Properties”. This will open your main display options in a new window. In this new window, click the “Settings” tab, which will show you what resolution your monitor is currently set to. You may also change your monitor’s resolution here if required. Mac OSX Users: Click on the apple logo in the top left of the screen. Select “System Preferences…” from the menu. Then click “Displays”, under Hardware. This shows you the current resolution your monitor is set to and also allows you to change it if required.