Can't change mainfont in revealjs presentation

[mickmcq]

I have the following YAML header in a revealjs presentation.

---
title: Statistics, Intro
author: Mick McQuaid
date: 2022-09-29
format:
  revealjs:
    mainfont: serif
---

No matter what I choose in place of serif, such as Times New Roman, Georgia, or STIX, I get the fonts from the default theme. I'm rendering this by saying

quarto render index.qmd --to revealjs

Whenever I use any theme, its font is properly loaded, but I can't seem to change that either.

[cderv]

revealjs format in Quarto does not have mainfont variable - see reference here: https://quarto.org/docs/reference/formats/presentations/revealjs.html

Autocompletion in RStudio IDE or VS CODE probably have not suggested that to you I think.

We use special improved theming system which you can customize using some SASS variables. See here: https://quarto.org/docs/presentations/revealjs/themes.html

You'll find example on how to change font.

[mickmcq]

Thanks for the suggestion to use the above URL instead of https://quarto.org/docs/output-formats/html-themes.html which is where I got mainfont. Thanks also for the suggestions of RStudio and VS CODE, although I will probably just continue using Vim.

[cderv]

FYI there is an extension for Vim and Quarto (https://github.com/quarto-dev/quarto-vim) but not help auto completion for YAML for now. Maybe in the future...