Something has changed the Format of my Office 2007 Inbox. How do I get back to my previous Inbox format?

Now when I open my Inbox, I see the items listed under "Today", "Yesterday", etc. I also have the Email text showing on the right of my screen.

All I want to view, when I open my Email Inbox, is my complete list of Emails. How do I change the settings to get the view that I want?