title: Spotfire - Custom Expression with marked rows
body: <p>I would like to know if it is possible to create a custom expression to change only marked rows like :</p>
  
  <pre><code>If(Marked([Filter]="Out")) else [Filter]="In"
  </code></pre>
  
  <p>Thanks for your help.</p>
  
  <p>Regards, Laurent.</p>