rstudio
Markdown elements and CSS selectors
One reviewer suggested that we generalize this section: https://bookdown.org/yihui/rmarkdown-cookbook/center-heading.html
Before discussing CSS, it would be helpful to give the readers more context on how Markdown translated into different HTML tags and how to determine which tags to include in their CSS (for example, by using Chrome Developer Tools or the SelectorGadget). Ideally, a table could even be included that maps common RMarkdown output elements to their appropriate CSS selector.
I feel it would be useful to have such a section. I know a lot of users are confused by the C ("cascading") in CSS, e.g., https://github.com/yihui/xaringan/issues/196 and https://stackoverflow.com/q/62718584/559676. They should be glad to learn more about how to select elements on HTML pages. We briefly mentioned it in the blogdown book: https://bookdown.org/yihui/blogdown/css.html
FWIW in case its useful in the future, I thought this was a nice concise comic about the precedence rules: https://twitter.com/b0rk/status/1286708570009022465?s=20
