The Ol' Tom wallpaper downloads will come in two sizes. They will be .JPG High Color and the sizes will be either 1024 x 768, or 800 x 600 in pixel resolution. Step 1: Click drop down menu below the image and the size you would like to save as desktop wallpaper. This will open the new wallpaper image and the size you selected. Step 2: "right click" on the enlarged image so that you can set it as your wallpaper, be sure that you have selected your correct screen size. Step 3: When you right click on the image you then click "Set as Wallpaper".