%% Copyright 2016 Daniel Ballester Marques %% %% This work may be distributed and/or modified under the %% conditions of the LaTeX Project Public License, either version 1.3 %% of this license or (at your option) any later version. %% The latest version of this license is in %% http://www.latex-project.org/lppl.txt %% and version 1.3 or later is part of all distributions of LaTeX %% version 2005/12/01 or later. %% %% This work has the LPPL maintenance status `maintained'. %% %% The Current Maintainer of this work is Daniel Ballester Marques. \documentclass{article} \usepackage{pdfpagediff} \begin{document} \layerPages{NBR6023-2002.pdf}{NBR6023-2002_reference.pdf} \end{document}