set different fonts for the body and margin notes for tufte bookdown pdf

Question

I'd like to set different fonts for the body and margin notes of a bookdown::pdf_book with base_format: tufte::tufte_book. This answer shows how to change the overall styling by adding to header-includes: in the YAML.

Is there a similar latex approach for setting different fonts/sizes to control the main vs margin note text?

Answer 1

You can adjust the fonts like this:

\setmainfont{Arial} % font of the main body
\setsidenotefont{\fontspec{Zapfino}} 
\setcaptionfont{\fontspec{Zapfino}} 
\setmarginnotefont{\fontspec{Zapfino}} 
\setcitationfont{\fontspec{Zapfino}}