I have Nitro PDF Professional. I mainly use it to convert PDF files to Word (doc and rtf). I can combine word documents and pdf documents into a single PDF file. All these can be done just from the right-click menu. We can take screenshots of region of a PDF file, inside NPPro. It copies that screenshot to clipboard, which can be saved or edited by using photo editors like Irfanview. You can extract images from NPPro and there are many features that are very useful, but I didn't tried all those features .