**Issue:** Until now, omitting "OUTPUT_TYPE" has following behaviour: > If OUTPUT_TYPE is ommited, RMarkdown produces an html document. But I dislike this, because specifying the desired output format under ["output"](https://rmarkdown.rstudio.com/lesson-9.html) in the [YAML metadata of your document](https://bookdown.org/yihui/rmarkdown/output-formats.html) is completely ignored! **Example:** ``` --- title: test author: Luca Leon Happel date: 2020-07-11 Sa 02:48 18 output: pdf_document --- Here is my _really_ fancy text! ``` produces an html file, when ":RMarkdown" is run! **Possible fix:** Just run `:!Rscript -e 'library(rmarkdown);render("%")'` would do just what I want.