If you want to add another page to a Word template, move the cursor to the end of the page after which you want to insert a new page. Now press Ctrl+Enter or Cmd+Enter. This will create a page break.

To insert design or text elements from other pages, first select these elements. Then copy them to the clipboard using Ctrl+C or Cmd+C. Then go to your new page and paste the elements using Ctrl+V or Cmd+V.