All images that enter your computer have an extension relating to what format they are in. You may have an image from a scan, a clipart disk or downloaded from a clipart service. Some are .eps and .wmf files (Vector line format more common for logos or line drawings) and others jpeg an .gif (Bitmap pixel photos and illustrations)
Think of everywhere clipart can be used in your restaurant: menu, cups, napkins, table toppers, newspaper ads, flyers, coupons, television commercials, door hangers, signage, window clings, temporary tattoos, coloring books, doggie bags, flags, banners, receipts, letterheads, business cards, refrigerator magnets, postcards and much more. Each and every one of these is an opportunity to build your brand and consistency is the key. The clipart elements you choose should have a consistent look so they reinforce each other and the brand you're building.
Modifying clipart makes it look professional, unique, and interesting. Here are a few ways clipart can be modified to enhance its appearance: