# How do I set the default beamer font to Computer Modern serif?

The default beamer font seems to be Computer Modern sans serif. How do I change this to serif?

Note: \setbeamerfont{<element>}{family=\rm} seems to work for specific elements such as title, but I want this to be a global change.

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\usefonttheme{serif}

There are some options to this command. They are described on p. 194 of the beamer manual.