I'm still new using beamerposter. I found the template by Nathaniel Johnston here. There is a default setting in the template. However I'm not sure what the font size is. Now, I was recommended to use 24 pt font size by an advisor. The poster size is A0 if it is relevant. I looked around the web. One way to change the font size seems to be font size option in documentclass. I chose different font sizes, however it doesn't reflect the change. The scale option does change the font size. However, it is hard to tell what the font size is.


This is current font size.

How can I use 24 pt size font in my poster? Otherwise how can I tell what font size is used so that I can adjust the font size by using scale option?

  • 1
    You can use the anyfontsize package, if I understand your request correct. Commented Apr 23, 2016 at 10:19

1 Answer 1


The template uses the documentclass beamer. Font sizes are predefined and there are eight default sizes: 8pt, 9pt, 10pt, 11pt, 12pt, 14pt, 17pt and 20pt.

If you want to achieve 24pt, then use 20pt as an option for the documentclass:


Set option scale from the beamerposter-package to scale from 20pt to 24pt (1.2*20 = 24):


The text in the poster is in normalsize by default, so you can be sure that the text will be 24pt.

  • It seems working according to your answer. By comparing the font size produced by the above setting to the font size produced by tikzposter which produces 25 pt font size, I can see the size is quite similar. The font size also seems to change to the predefined sizes. I wonder how beamerposter behaves if I choose the size not in the predefined sizes? It seems it picks up the one closest to the predefined size. But I'm not sure. Anyway, I believe it solved my problem.
    – ThBoo39
    Commented Apr 23, 2016 at 23:30
  • If you don't choose a predefined size, it will pick the closest one (like you already discovered). A font size that is in between two font sizes (e.g. 13pt is between 12pt and 14pt) will be reduced to the smallest one (12pt).
    – Zim
    Commented Apr 24, 2016 at 9:48

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