Manage the Help Viewer Window
In the Help Viewer you can customize the window layout.
The Help Viewer supports standard docking functionality. By default, all tabs in the Help Viewer are docked, but you can move them, resize them, dock them in other locations, and "float" them so that they appear as independent child windows.
To restore the Help Viewer window to its default layout, open the Viewer Options dialog box, and then choose the Reset button.