I’m using RMarkdown’s code-folding to hide code in an HTML document with this in the YAML header:

---
output: 
  html_document:
    code_folding: hide
---

But in the rendered document it’s impossible to know what each chunk is doing without unfolding it, or putting a text description before/after it.

Is there a way to change the appearance of a folded chunk so it displays the chunk label (or a short description) of each chunk next to the “Show” button, preferably in a way that distinguishes it from regular markdown text? Ideally I’m hoping to have a chunk like this:

#| fold-label: "Import and cleanup data"
#| warning: FALSE

library(tidyverse)

mydata <- read.csv("path/mydata.csv", headers = T)
mydata <- mydata %>%
  mutate(cleaned = T)

Look like this when folded (but keeping the Show button):

# Import and cleanup data