mail viewer window
I don't know why, but in the mail viewer window, I have lost the right-hand side which shows the message content.
I still have the mailbox column on the left, and the abbreviated list of messages which used to be in the middle, but now I do not have the full message content of the message selected unless I double-click on the abbreviated message which will then open the message in a new window.
Been puzzling over this (and trying things) for days. Really miss seeing the entire message!
Any help is appreciated!
Thanks!
MacBook Pro with Retina display, OS X El Capitan (10.11.6), Mail