I just got off the phone with Apple and the tech gave me almost the same solution. I selected an email in Column view and then dragged the cursor up to that email. The Preview pane automagically appeared.

I commend you for your courage in trying to replicate my issue and I hope that your blood pressure has returned to normal! smile

Last edited by jchuzi; 07/31/20 04:51 PM.
Jon

macOS 11.7.10, iMac Retina 5K 27-inch, late 2014, 3.5 GHz Intel Core i5, 1 TB fusion drive, 16 GB RAM, Epson SureColor P600, Photoshop CC, Lightroom CC, MS Office 365