title: Change the font size of only the column names in DT::datatable() in R
body: <p>How can I change the font size of only the column names in <code>DT::datatable()</code>.Not the cell values.</p>
  <pre><code>DT::datatable(iris)%&gt;%
            formatStyle(names(iris), # select all columns in table
                                         fontsize=&quot;50%&quot;)
  </code></pre>