The DNA views are displayed as tabbed views in the workspace. Use the commands in the Window menu (or right-click a view tab) to manipulate the on-screen appearance of open window tabs.
You can move between tabs, arrange the tabs horizontally or vertically, close tabs, or have one tab fill the DNA workspace (Prominent). Select Prominent a second time to restore the display to its normal state.
With the Bounce Diagram and Packet Trace views both open on your desktop, try selecting different options from the Window menu to see the results.