How can I drag a page between pdf documents?

I often assembe a new pdf from pages taken from other documents -- in Acrobat I can just drag the page between the files when both are open on the screen, but I don't seem to be able to do this in FineReader. I know I can save pages from one document and then open the saved pages in the other documents, but then I have to move the inserted pages to the right place in the new file. A bit tedius. A related task is to reverse the order of pages that happened to be scanned from back to front.