Qr-Code (or Quick Response Code) is a sort of two-dimensional barCode that consists of black squares arranged in a square grid on a white background. Qr-Code can be read by smartphone camera or specialized devices that are dedicated to Qr reading - hand-held scanners, handy terminals, fixed scanners that are used after placing it on a desktop, or embedding it in other devices. Usually Qr-Codes contain data that points to a website or application, emails, or phone numbers, product identifiers, or trackers....Signature Product Solution GroupDocs...Documentation / GroupDocs.Signature Cloud / Developer Guide /...