title: How to spellcheck R comments with RStudio on R source files?
body: <p>How to conveniently spellcheck R comments with RStudio on R source files? </p>
  
  <p>I am writing a package and I want it to look professional. Thanks to Oxygen, all package's documentation lives in R comments, which by default is excluded from spell checking. So even if spell checking functionality does exist in RStudio, I don't know how to use it.</p>