The following is courtesy of www.TheWebElves.Net. They found it for me and I just had to share because no one else has!
How to Sort by other than date or unread or attachments or starred (the most unhelpful choices - beyond unread)

In mail there is a gear in the upper right hand corner. it will drop down when you hover over it. Click on Settings, (remember you can click the images)

click on Viewing email,

uncheck the "enable conversations" check box. Click save.

Now you will be able to sort by help choices such as sender or subject when you click view (just below the gear in the upper right hand corner).