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
Before we can start hacking together our own simple PDF file, a quick look at the high level structure of a PDF is in... People sometimes try to edit a PDF file by opening the file in a text editor. This very rarely works for 3 reasons. Firstly,... 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... 
