title: Apply bold font on specific axis ticks
body: <p>Here's a plot: </p>
  
  <pre><code>library(ggplot2)
  library(tibble)
  
  ggplot(head(mtcars) %&gt;% rownames_to_column("cars"),
         aes(x = reorder(cars, - drat), 
             y = drat)) +
    geom_col() +
    coord_flip()
  </code></pre>
  
  <p>How can I apply bold font on specific car names (for example just on "Hornet 4 Drive" and "Datsun 710")? </p>
  
  <p>I would prefer a quite "general" answer, i.e an answer that makes it easy to apply a particular color or another font family instead of bold font.</p>