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
There have been several revisions of the PDF file specification, each backward compatible but adding new features. For example, the PDF format version 1.6... We have always offered a free PDF viewer plugin which is a nifty little plugin to not only allow you to view and search... One of the really useful features of the PDF file format is the ability to have interactive elements. These began as just simple checkboxes,... 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... 