I\'m hoping this is a question with a simple answer. I am using Rmarkdown/knitr to author a PDF document (in RStudio). Many LaTeX classes (like article) automatically indent
If what you're after happens to be the default settings in other regards as well, you might also be interested in setting the \parskip
option to its default setting, since it is otherwise set to {6pt plus 2pt minus 1pt}
header-includes:
- \setlength\parindent{24pt}\setlength{\parskip}{0.0pt plus 1.0pt}