PDFs were designed to be a universal, easy-to-read document format, and they serve that purpose well. If you have a collection of images—say, documents you scanned into your computer as JPEGs—you can ...

Free software on your phone or tablet lets you scan, create, edit, annotate and even sign digitized documents on the go. By J. D. Biersdorfer I write the monthly Tech Tip column, which is devoted to ...