If you need to scan delicate or thick material that you can’t put through a document feeder on a portable scanner or all-in-one printer, you should use a flatbed scanner. They also let you use resolutions well beyond the 1200 dpi of most portable scanners.After scanning documents, old books, and photo prints, we think that the Canon CanoScan LiDE 300 is the best choice for scanning documents, drawings, or photos.