Corporate Smalltalk Consulting today announces PDF 1.6.7 for iOS, an update to their document viewer app that allows the user to view both oversize and large multi-page PDF documents easily. The app employs proprietary Can Opener technology to convert and pre-render large documents for smooth scrolling and zooming. In addition to PDF files of thousands of pages, PDF 1.6.7 can easily handle page sizes of 44 x 44 inches. The app includes Dropbox connectivity and can display PDFs stored locally.