As the title suggests I somehow lost the preview column in Mail. I don't know what I did if anything to cause it. I want to show the emails in the left column and the preview them on the right. Right now it just shows the emails in the left column. I googled the issue many times but could not resolve it. Some said that there was a dot on the right side to change the layout but I don't see it. Is there an easier way to do it? thanks for a reply.