The Swap Views
button toggles between the current view and the view that was current before it.
Select Window> Swap Views
or press F7 to switch between the two most recent views.
Press the Ctrl + Tab keys to cycle through all open views.
Select Window> Next Window
or Window> Previous Window
to cycle through all open views in the order you prefer.
A list of all the views currently open is located at the bottom of the Window menu. Each view is identified by its name and what type of view it is. Select one to go directly to that view.