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
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... PDF page size is generally defined by the CropBox or MediaBox setting for each page. This is the number of pixels. This provides a... 
