The resolution of PDF files is thought to generally be large when printed. The QR code images is obvious and easily scanned, even though printed in tiny dimensions.?? ???? ???? ????? ???? ????????? ??????? ???????? ??? ?????? ???? ??????? ????? ???? ?????? ??? ???? ??????? ?????. ?????? ????????? ??????? ???????? ?????? ???? ????????? ??????? ????