view-exits-all-viewing-windows

view-exits-all-viewing-windows is a variable defined in `view.el'.
Its value is

nil

Documentation:
Non-nil means restore all windows used to view buffer.
Commands that restore windows when finished viewing a buffer,
apply to all windows that display the buffer and have restore
information. If `view-exits-all-viewing-windows' is nil, only
the selected window is considered for restoring.

You can customize this variable.