overlay one pdf or ps file on top of another

Question

I have two pdf or postscript files (I can work with either one). What I want to do is merge each page on top of the other so that page1 of document A will be combined with

Answer 1

VeryPDF PDF Editor has a PDF Overlay function, look at this web page,

http://www.verypdf.com/wordpress/201304/how-to-overlay-pdf-to-another-pdf-35885.html