### Bug description

`mainfont`, `monofont`, `fontsize`, `linestretch`, and `monobackgroundcolor` are listed as [YAML header options](https://quarto.org/docs/reference/formats/presentations/revealjs.html) for Revealjs presentations, but they are ignored when the presentation is rendered - only shows the defaults for these theme elements.

System is Mac OS X (Big Sur 11.6.8) with the latest RStudio Preview release (22.07.01 Build 554) and the latest Quarto release (1.0.38). The full test Quarto document is:

````md
---
title: "Test"
format: 
  revealjs:
    mainfont: "Times New Roman"
    monofont: "Times New Roman"
    fontsize: "10px"
    linestretch: 5
    monobackgroundcolor: green
---

## Hello, World!

Hello, world!

```{r}
#| echo: true
print("Hello, world!")
```
````

The (no format change) result is the same for any option in isolation or in combination. But the YAML header options work fine if the format is switched to `html`. 

I can make all these format changes just fine using a Sass theme - so the question is not how to make these changes, but rather whether or not they should work using the YAML header options.

### `quarto check` Output

```bash
[✓] Checking Quarto installation......OK
      Version: 1.0.38
      Path: /Applications/quarto/bin

[✓] Checking basic markdown render....OK

[✓] Checking Python 3 installation....OK
      Version: 3.9.7
      Path: /Users/ryan/.pyenv/versions/3.9.7/bin/python3
      Jupyter: 4.11.1
      Kernels: julia-0.4, ir, julia 0.3, python3

[✓] Checking Jupyter engine render....OK

[✓] Checking R installation...........OK
      Version: 4.2.1
      Path: /Library/Frameworks/R.framework/Resources
      LibPaths:
        - /Library/Frameworks/R.framework/Versions/4.2/Resources/library
      rmarkdown: 2.14

[✓] Checking Knitr engine render......OK
```

### `quarto tools check` Output

```bash
[✓] Inspecting tools

Tool         Status                    Installed     Latest  
chromium     Not installed             ---           869685  
tinytex      External Installation     ---           v2022.08
```

### Checklist

- [X] [formatted your issue](https://yihui.org/issue/#please-format-your-issue-correctly) so it is easier for us to read?
- [X] included a minimal, fully reproducible example in a single .qmd file? Please provide the whole file rather than the snippet you believe is causing the issue.
- [X] documented the quarto version you're running, by pasting the output from running `quarto check` in the "Quarto Check Output" text area?
- [X] documented the version of the quarto tools you're running, by providing the output from running `quarto tools check` in the "Quarto Tools Check Output" text area?
- [X] documented the RStudio IDE version you're running (if applicable), by providing the value displayed in the "About RStudio" main menu dialog?
- [X] documented which operating system you're running? If on Linux, please provide the specific distribution as well.
- [X] upgraded to the latest version, including your versions of R, the RStudio IDE, and relevant R packages?
dragonstyle
2022-08-10T13:59:00Z
ryanraaum
bug
Future
open
YAML font options ignored for revealjs presentations
https://github.com/quarto-dev/quarto-cli/issues/1790