title: Add text outside plot area
body: <p>Sample code</p>
  
  <pre><code>library(ggplot2)
  ggplot(mtcars, aes(mpg, cyl, color = vs)) + geom_line()
  </code></pre>
  
  <p>How if it is possible to add arbitrary text to the x axis like in this example made using the plot above and then I wrote on it "arbitrary words"</p>
  
  <p><a href="https://i.stack.imgur.com/zRw2u.png" rel="noreferrer"><img src="https://i.stack.imgur.com/zRw2u.png" alt="enter image description here"></a></p>