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I am trying to create a poster with font size of 12pt. What should be the value of fontscale?

\documentclass[landscape,paperwidth=22in,paperheight=28in,fontscale=?]{baposter}
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0.83. I think.

What baposter seems to do is to set the paper width to paperwidth x fontscale, as supplied in the class options, and similar for the height. It then scales the page up again (with help from pgfpages) to the defined paper size. As the base class is article, which uses 10pt as the default, you need 10pt/12pt ≈ 0.83 for fontscale.

\documentclass[paperwidth=22in,paperheight=28in,fontscale=0.833]{baposter}
\begin{document}
Foobar
\end{document}

Here is an attempt at a comparison with article. The different Foobars are from screenshots at the same magnification.

enter image description here

  • You mean I should get font size 10pt with fontscale=1? right? – D_B Sep 8 '17 at 17:17
  • @D_B I think you have a strange definition of huge. See image I added to my answer. – Torbjørn T. Sep 8 '17 at 17:17
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I don't know what the values of fontscale should be and don't have the class baposter on my machine (and it isn't on CTAN).

But you can choose arbitrary fontsizes using \fontsize{<fontsize>}{<baselineskip>}\selectfont provided that you use a scalable font (like e.g. lmodern or helvet).

  • But it seems that the result from \fontsize also depends on fontscale. I mean with different fontscales, I get different sizes even if \fontsize{12pt}{14.4}\selectfont is kept there. – D_B Sep 8 '17 at 16:57
  • @D_B Of course it depends on fontscale, as I said in my answer, the poster is first made with a smaller papersize (depending on fontscale), and then scaled up afterwards. – Torbjørn T. Sep 8 '17 at 17:06

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