# Adding latex to existing pdf document?

I would like to import a pdf document and add additional code on top of the image (the pdf). I can write over figures by the overpic package. The problem is that I would like my compiled latex file to have the same exact document size (geometric) as the imported graphic (pdf). Is this possible?

• I do not think so -- at least not in a systematic manner. Strange request by the way. – Dr. Manuel Kuehner Nov 6 '17 at 16:46
• Maybe add your image as background and then you can add whatever you want on top of it to the page? – user36296 Nov 6 '17 at 16:52
• exact document size = file/data size or geometric size? – Dr. Manuel Kuehner Nov 6 '17 at 16:58
• if you use standalone then the final document size is the size of the content, which will be the size of the original pdf page if you only over-print text. – David Carlisle Nov 6 '17 at 17:25
• @Dr.ManuelKuehner I'm assuming the OP means the page dimensions not the size of the data. – David Carlisle Nov 6 '17 at 18:11

You can use the pagecommand option with includepdf to overlay the document with tikz.

\documentclass{article}
\usepackage{pdfpages}
\usepackage{tikz}
\begin{document}
\includepdf[pagecommand={\begin{tikzpicture}[remember picture,overlay]
\fill[red, opacity=0.3] (current page.south west) rectangle (current page.north east) ;
\end{tikzpicture}\thispagestyle{empty}}]{test.pdf}
\end{document}

• It would be nice if you can show the implementation of this with an explicit example. – Cragfelt Dec 16 '17 at 10:21