# Scale Feynman Diagrams to Poster Size

I am creating a poster using beamerposter, and I would like to include Feynman diagrams generated using feynmp. However, the native scaling of feynmp is indented for letter-size documents, and is far too small for a poster. Is there a way to scale the diagram to poster-size while keeping its features properly proportioned?

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meta.tex.stackexchange.com/questions/1436/welcome-to-tex-sx. Can you provide a MWE? Did you try scalebox or \adjustwidth or resizebox? –  cacamailg Apr 18 '13 at 16:51
\setlength{\unitlength}{4\unitlength} will scale the diagrams four times their original size. –  egreg Apr 18 '13 at 20:11
scalebox is closest to what I need. However, it also blows up the font sizes as well on the labels, which were already enlarged from beamerposter. The setlength solution just stretches out the diagram, so it looks very thin and wiry. Perhaps I should just create the diagram as a standalone pdf, and then use it in the main document via includegraphics. –  xvtk Apr 28 '13 at 21:31
@xvtk In case you solved this the way you mentioned, can you post (and accept) that as an answer so this question isn't considered "unanswered" by the system anymore? –  Tobias Kienzler May 2 '13 at 6:16

Here is the workaround I used. I created the Feynman diagram in its own .tex file:

\documentclass[letterpaper,border=1mm]{standalone}

\usepackage{feynmp}
\DeclareGraphicsRule{*}{mps}{*}{}

\begin{document}
\unitlength=0.5mm

\begin{fmffile}{feyn_fig}
\begin{fmfgraph*}(100,50)

...[feynmp stuff here]...

\end{fmfgraph*}
\end{fmffile}

\end{document}


and I compiled it with pdflatex and mpost. The standalone package takes care of removing the extra bordering whitespace. I included the Feynman diagram in the main document (the poster) with \includegraphics, which properly scaled both the diagram's features and text.

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