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I am trying to write a poster using the a0poster class. I have encountered a problem that drives me crazy. It seems that the class creates the correct size of text and spacing but outputs everything on a A4 paper size. So my .tex file is the following.

\documentclass[portrait,a0]{a0poster}
\usepackage[utf8]{inputenc}

\begin{document}
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Suspendisse dolor sem, vulputate nec interdum sit amet, convallis sollicitudin ex. Cras hendrerit, augue at scelerisque hendrerit, dui urna aliquet orci, in maximus urna leo vitae nibh.
\vspace{1em}
\hrule
\vspace{1em}
\begin{minipage}{0.49\linewidth}
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Suspendisse dolor sem, vulputate nec interdum sit amet, convallis sollicitudin ex. Cras hendrerit, augue at scelerisque hendrerit, dui urna aliquet orci, in maximus urna leo vitae nibh.
\end{minipage}
\begin{minipage}{0.49\linewidth}
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Suspendisse dolor sem, vulputate nec interdum sit amet, convallis sollicitudin ex. Cras hendrerit, augue at scelerisque hendrerit, dui urna aliquet orci, in maximus urna leo vitae nibh.
\end{minipage}
\end{document}

This .tex file produces the following .pdf

enter image description here

Any thoughts on that? Does it create the same .pdf on your systems? So far I have tried on 2 different computers.

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  • Welcome to TeX.SX! The default paper size is a4 or letter. – user31729 May 11 '15 at 12:59
  • Checking with package printlen, the paperwidth is 839.6 mm, DIN A0 would be 841 mm, so it is definitely not A4. The pointsize of the current font is 24.88 pt. – Johannes_B May 11 '15 at 13:02
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    At no point in the minimal example, file pdftex.def is loaded. Please load package geometryas well. :-) – Johannes_B May 11 '15 at 13:06
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    \usepackage[a0paper]{geometry} should help – user31729 May 11 '15 at 13:06
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    as mentioned below, a0poster comes with a driver for dvips to set the correct page size, but not for direct pdf output. This is where file pdftex.def drops in. – Johannes_B May 11 '15 at 19:33
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You can load package geometry to get the right page size, it will change your margins though. Giving the package option pass will prevent that.

On the other hand, you can as well load package graphicx or load file pdftex.def in your preamble.

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  • I thought that the a0 option takes care of this. Isn't this the case? – tst May 11 '15 at 18:03
  • @tst No, apperently not ;-) The correct pagesize is set when pdftex.def is read, which is loaded by multiple packages, but unfortunately not by a0pster by default (as there is also XeLaTeX and others). a0poster isn't exactely the newest in the bunch of poster classes and, as you mentioned, it works with dvips very fine. The class takes care, but back then, pdflatex wasn't as widespread as it is today. – Johannes_B May 11 '15 at 19:32
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Apparently this is a problem with PDFlatex. Compiling with latex creates a correct size '.dvi' file and the the conversion to '.pdf' creates the expected result.

Edit: Well, correct size .dvi is not a precise statement, but I guess you know what I mean.

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