title: How to change the font size of Excel file exported from a Datatable?
body: <p>I want to change the exported Excel file's default font size of <code>11</code> to <code>9</code>. This is my excel button.</p>
  
  <pre><code>{
    extend: 'excel',
    filename: 'filename',    
    customize: function( xlsx) {
      var sheet = xlsx.xl.worksheets['sheet1.xml']; 
    }
  }
  </code></pre>