With an A3 printer, you can also print larger documents such as flyers, posters, brochures, and other prints. Want to scan and copy as well? Choose an all-in-one A3 printer. With some printers, you can also print in A3+ size. This leaves space for cutting marks for prints. With an A3 printer that prints in duplex, you can print on both sides of the paper. That's useful for flyers and brochures.