In addition to printing, a Canon all-in-one printer can also scan and copy. There are inkjet and laser all-in-one printers. All current Canon all-in-one printers have WiFi and can print in color. A number of models can also print in duplex, fax, and have an automatic document feeder. That allows you to scan or copy a whole stack of documents in one go. Before you purchase a Canon printer, determine which functions you need.