Currently there's no way to globally adjust the font size used in speaker notes; see [stackoverflow](https://stackoverflow.com/questions/75213819/how-to-change-the-default-font-size-in-quarto-speaker-notes)  and [RStudio Community](https://community.rstudio.com/t/create-a-div-that-will-reduce-font-size-of-speaker-notes/158274). This is an enhancement request. 

I should add that `Ctrl- -` and `Ctrl- +` do the  job, so it's not a showstopper, but a "nice to have".
2023-01-26T16:25:39Z
rmcd1024
enhancement revealjs
Future
open
Customize speaker note font size
https://github.com/quarto-dev/quarto-cli/issues/4112