Invented by Adobe Systems over 20 years ago, the Portable Document Format (PDF) is now an open standard for electronic document exchange maintained by the International Organization for Standardization (ISO). When you convert documents, forms, graphics, and web pages to PDF, they look just like they would if printed.
PDF
I was recently sent a PDF file where some of the metadata appeared to be wrong. In particular, the PRODUCER field was appearing in... How to calculate PDF Image dpi Most elements of a PDF file are device independent Vector graphics. This means that they will always appear... White is a special color in the PDF file format. This is because of the way different colours work in the PDF file format.... Update: You can see all these modes in action on Youtube. A PDF file is a multipage document which can contain many pages. Unlike... This is part of a series on How to make your own PDF files. It would be nice to get some color on the... 
