The 
keys work to enable backward and forward navigation through the viewed nodes.
The 
system works to covert a window into a viewable tab.
You can also reverse this action. In the tab view, in the same control panel position, a window symbol 
becomes available for your use. This symbol sends the tab view of the database back into a one window view. The view of this window will be displayed in the desktop tab. Through the respective lowered menu, windows can either all be turned into tabs or vice versa, all tabs can be turned into windows.
