Foxit Reader is a good tool for opening PDF documents in Windows operating systems. It is very different from other similar programs, the speed of work, it is really very fast. It can be safely called, if not the best, then one of these viewers. The only thing that does not please is the fact that it does not allow much editing of such documents. But he can allow his user to copy the desired text from the document to the clipboard, to search for it.
It is possible to view files page by page, navigate to the page as directed by its number, print documents that are viewed. To extend the program you can use different plugins. By the way, you can convert a PDF document into a plain text file that opens in a standard notepad. Of the nice features I want to highlight Auto-scrolling, which can be enabled by pressing the middle button on the mouse. If necessary, you can add notes to the text in the document, graphic symbols, text with highlights. And of course, the program has the support of scripts written in Java, which is good news.