What can there possibly be to know about wallpaper? Read on, you might be surprised.

• Wallpaper can be tiled across the screen or centered. Small pictures should be tiled, or painted repeatedly across the screen. Larger pictures look best when they're centered. Windows 98 adds a stretch option, which expands a single picture to fill your screen. Select your preference by selecting it from the Display box.
• Anything you create in Windows 98 Paint can be used as wallpaper. In fact, you can even use Paint to alter the wallpaper Microsoft provided with Windows.
• When using wallpaper, turn off your Active Desktop feature, or Windows might be confused the next time you turn on your computer. To turn it off, right click on your desktop, click the Active Desktop, and click View As Web Page to remove the check mark.
• Wallpaper looks like a lot of fun, but it may be too much fun if your computer doesn't have more than 8MB of RAM. Fancy, colorful wallpaper files can use up a great deal of the computer's memory, consistently slowing Windows down. If you find yourself running out of memory, change the wallpaper to the (None) option. The screen won't look as pretty, but at least Windows works.
• Small files that are tiled across the screen take up much less memory than large files that are centered on-screen. If Windows 98 seems slow or it sends you furtive messages saying that it's running out of memory, try tiling some smaller bits of wallpaper.
• Patterns, accessed through the Pattern button, are a poor-man's wallpaper. They're only one color, and they don't vary much. If Windows keeps complaining about needing more memory, however, dump your wallpaper and switch to patterns. They don't eat up nearly as much memory.
• And of course, if you spot an eye-catching picture while Web surfing, you can click that Web site's picture with your right mouse button and select the Set as Wallpaper option. Sneaky Microsoft copies that picture to your desktop and leaves it on the screen as your new wallpaper. (Just keep the image on your own desktop; don't try to sell it or give it away, or you might run afoul of copyright laws.)