Indicate how to remove a window (or list of windows, previously         
selected with Window->Select, when 
Global is pressed).
Scope
When the 
Scope is 
All, the window and all 
its layers are removed. This is the default.
When the 
Scope is 
Contents, the window is preserved 
but all its layers are removed and replaced by a new one. The new
layer becomes the current object and the current layer.
Clicking the mouse over the graphic area in the current window
creates a menu with all the windows, which can then be selected.
Initially, the identification of the current window is inserted 
in the 
Window entry. This task cannot be reversed, so 
pressing 
Ok is required.