# How to remove the warnings “Font shape OT1/cmss/m/n' in size <4> not available” and “Size substitutions with differences” in beamer?

LaTeX Font Warning: Font shape OT1/cmss/m/n' in size <4> not available
LaTeX Font Warning: Size substitutions with differences


I am using the files from http://www.poirrier.be/~jean-etienne/info/latexbeamer/latex-beamer.tar.gz.

How to remove the above 2 warnings?

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Please always include some code right in your question so that other users, including those who want to and are going to help you, can see the problem directly on here without having to go to some external web site. It'd be good if you could do that for this question as well, even though it has been answered. –  doncherry Jun 1 '12 at 7:37

\usepackage{lmodern}% http://ctan.org/pkg/lm


Fonts are typically available only in certain sizes/increments. As an example, the basic article document class loads only the following sizes (from size10.clo):

• \tiny @ 5pt;
• \scriptsize @ 7pt;
• \footnotesize @ 8pt;
• \small @ 9pt;
• \normalsize @ 10pt;
• \large @ 12pt;
• \Large @ 14.4pt;
• \LARGE @ 17.28pt;
• \huge @ 20.74pt; and
• \Huge @ 24.88pt

So, requesting a 15pt font size using something like

\documentclass{article}
\begin{document}
\fontsize{15}{18}\selectfont Hello world.
\end{document}


leads to LaTeX complaining in the .log file:

LaTeX Font Warning: Font shape OT1/cmr/m/n' in size <15> not available
(Font)              size <14.4> substituted on input line 3.
...
LaTeX Font Warning: Size substitutions with differences
(Font)              up to 0.6pt have occurred.


Using lmodern removes this restriction by allowing font sizes at arbitrary sizes. For more on font size requirements, see Fonts at arbitrary sizes.

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I know this workaround, but I also know that if you do that, math accents will be typesetted very badly. You can try i.e. $\ddot u$ or $\tilde J$ –  Wauzl Oct 17 '12 at 7:44
You can add this \let\Tiny=\tiny just after the documentclass declaration. So, it should look something like this:
\documentclass{beamer}
`