If you're using a Windows PC, find the image you want on the Internet. Point to it with your mouse and click the right button. In the menu that appears you should see an option that reads something like "Set as background." Click on that with the left button and voila. The image should now be your desktop wallpaper, and should be stretched to fill the screen.
Depending upon the quality of the source image, it may get a bit pixelated when enlarged. Try some of the images from the
DVC member web site. One of those may be of particularly high quality.
