title: openpyxl - How to preserve xlsx custom properties
body: <p>How do I preserve custom properties from xlsx template which I am modifying with <code>openpyxl</code>? When I <code>save()</code> workbook using <code>openpyxl</code> these custom properties vanish!</p>
  
  <blockquote>
    <p>Custom properties can be found here:-</p>
    
    <p>On Mac -> Go to File Menu in Excel -> Properties ... -> Custom tab ->
    Properties section</p>
  </blockquote>
  
  <p><a href="https://i.stack.imgur.com/YOngl.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/YOngl.png" alt="enter image description here"></a></p>