The PDF-XChange Viewer PRO extends the functionality of our award winning FREE PDF viewer to include additional features and options - essential to anyone creating, entering data to forms or modifying PDF files. Whilst no product can replace Adobe's own Acrobat Professional product if you have complex PDF file editing needs - if your requirement is any of the following, you can save $100's in unnecessary expenditure and you will find the PDF-XChange Viewer considerably easier to use!