You can use the toolbar to quickly apply a filter to the data you're viewing or customize the columns on each tab. You can also gain important insights into performance across different networks or time periods by using the "Segment" option:
Controls to show or hide paused or deleted campaigns and ad groups are also now available in this toolbar:
Just like the integration of the popular Search Query and Placement Performance Reports in the Campaigns tab, our hope is that this new toolbar will further streamline reporting and help you to get the most out of your AdWords data and your advertising campaigns.