在特定页面上打开RStudio中的演示文稿

Question

有没有办法控制RStudio预览器打开的滑动演示文稿的哪个页面？我希望能够预览我正在处理的页面，而不是演示文稿的第二页，它会一直打开。

Reprex：

library(slidify)
library(slidifyLibraries)
author("test_slides)

在index.Rmd文件中：

---
title       : Yada
subtitle    : Yada-yada-yada
author      : Yoda
job         : 
framework   : revealjs        # {io2012, html5slides, shower, dzslides, ...}
revealjs: {theme: night, transition: convex}
highlighter : highlight.js  # {highlight.js, prettify, highlight}
hitheme     : default 
widgets     : [mathjax]            # {mathjax, quiz, bootstrap}
mode        : selfcontained # {standalone, draft}
knit        : slidify::knit2slides
---

## Read-And-Delete

1. Edit YAML front matter
2. Write using R Markdown
3. Use an empty line followed by three dashes to separate slides!

--- .class #id

## Slide 2

- Yada

--- .class #id

## Slide 3  

- Yada yada yada

--- .class #id 

## Slide 4

I'd like to open up here!

--- .class #id