Add special beamer slide using RMarkdown

Question

I want to produce a beamer presentation from a RMarkdown file. I am in this case using this beautiful template: https://github.com/matze/mtheme

How in markdown can you specify that you want to insert, not a "normal" slide, by a special one, such as an appendix slide, or a standout slide?

This template contains a standout slide that I would like to use as final slide as they do in their demo slides (http://mirrors.standaloneinstaller.com/ctan/macros/latex/contrib/beamer-contrib/themes/metropolis/demo/demo.pdf)

In beamer, I would do:

\begin{frame}[standout]
Questions?
\end{frame}

What is the equivalent in Markdown?

Answer 1

Setting frame options is pretty straight forward:

---
title: "Untitled"
output: beamer_presentation
theme: "metropolis"
---

```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = FALSE)
```

##  {.standout}
Questions?