Email Preview has disappeared!
In Mail, all of a sudden, I have lost the preview of emails altogether. It's not at the bottom of the Mail viewer, and it's not on the side. If I go to View> Show Side Preview is ticked. I have tricked unticking it, and restocking it. Nothing changes. I have closed and re-opened Mail. I have re-booted my MacBook.
Can anyone help me find my email Preview??
MacBook