What are wallpapers?

And how do I put one up?

A wallpaper or desktop picture is the image that is used as a background on the desktop of a computer screen as well as on cell phones and other devices.

You can customize your desktop pictures quite easily and make your computer personal by changing the image used as the background for your desktop. We tend to spend more and more time at our computers at work and at home. Just like we enjoy personalizing our office space or our homes we can personalize our computer.

In Windows this type of image is referred to as a "wallpaper" and on a Mac it is called a "desktop picture". Click on the links to guide you through how to change your wallpaper in Windows and how to change your desktop picture on a Mac.

Wallpapers or desktop pictures are available in many different formats to fit different monitor sizes.

Fullscreen and widescreen monitors have different proportions for wallpapers.

Although wallpapers can be scaled by the system, picking a size that corresponds with the resolution of your monitor ensures that there is no loss of quality caused by scaling the image.

In Mac OS X you can set your system to automatically change your desktop picture and pick one of the intervals offered such as every hour, every day or when waking from sleep.