Portable Document Format (PDF) is a file format used to present documents in a manner independent of application software, hardware, and operating systems.
PDF File Format
What is an OCR PDF file? Some PDF files are generated from scanning in pages as images, and these have their own unique quirks.... One of the really cool features about PDF files is that they are not a boring, static file format – they can interact with... Color is a complex topic in PDF. This article helps to explain how it works. How to define Color in PDF files Color can... How are images stored in a PDF file? When I was learning the PDF file format, I found Images could be quite a complex... I came across an interesting issue with PDF Text fields while debugging a file this week. We were sent a 2 page document created... Understanding PDF Text Objects Inside a PDF is a Postscript stream of commands which describe the page – they draw the text, images or... 
