title: How to save changes in read-only Jupyter Notebook
body: <p>I have opened a python Jupyter notebook but did not notice that it was in read-only, Not Trusted mode. How to save my changes now?</p>
  
  <p>Things that I have tried and did not help:</p>
  
  <ul>
  <li>File -> Make a Copy</li>
  <li>File -> Save and Checkpoint</li>
  <li>File -> Download as</li>
  <li>File -> Trust Notebook</li>
  </ul>