# Sawasdee Font in Beamer Poster

I'm trying to use the "Sawasdee" font in a beamer poster (installed as a TrueType font from fonts-tlwg-sawasdee ubuntu package). I can activate it in a regular (scractl) document by using `\usepackage{fontspec}` and `\setmainfont{Sawasdee}`, and compiling with `lualatex`. However, when I try these commands within the `beamerposter` document class, the font does not change. I looked at this post: Setting Font attributes in Beamer, but I could not relate the instructions to using this font, which is a TrueType font separate from LaTeX (correct me if this does not make sense). So how can I force `beamerposter` to use this system font?

Beamer uses `\sffamily` (sans serif) fonts by default, but `\setmainfont` in `fontspec` only sets the `\rmfamily` font. So there are two ways to solve this problem, you can set the sans font to Sawasdee using
``````\setsansfont{Sawasdee}
``````\setmainfont{Sawasdee}