SetSelectedNotebook[notebook] makes the specified notebook be the currently selected one in the front end.
SetSelectedNotebook takes a NotebookObject as its argument.
Setting a particular notebook to be the currently selected one typically makes it the top notebook displayed on the screen.
Making a notebook the currently selected one does not affect the current selection within that notebook, or within other notebooks.
See Section 2.11.3.
See also: SelectedNotebook, Notebooks, WindowClickSelect.
New in Version 3.