Do you want to duplicate a single-page and multi-page Word document without copy paste but with formatting intact? See this post!

How to Copy Entire Pages in Word 2007. It isn't uncommon to reuse a single page from a multipage Word document. You can copy the entire document by pressing Ctrl-A or clicking "Edit | Select All ...

Creating a unique header for a single page in Word 2013 can be challenging at first; when you edit the page header, Word applies the change to all the pages in the document.