SetOptions
 Usage
• SetOptions[s,  -> ,  -> , ... ] sets the specified default options for a symbol s. • SetOptions[stream, ... ] or SetOptions["name", ... ] sets options associated with a particular stream.
• SetOptions[object, ... ] sets options associated with an external object such as a NotebookObject.
Notes
• SetOptions is equivalent to an assignment which redefines certain elements of the list Options[s] of default options. • SetOptions can be used on Protected symbols. • SetOptions returns the new form of Options[s]. • You can use SetOptions on InputStream and OutputStream objects. If there is only one stream with a particular name, you can give the name as a string as the argument of Options. • SetOptions can be used on a list of streams, such as the value of $Output. • If you use SetOptions[NotebookObject[... ], ... ] the kernel will send a request to the front end which will immediately make the change specified.
 Further Examples
We set variable s to save the current settings of the options of Plot3D.
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We plot the surface with the current option settings; the default for Plot3D is to show the bounding box. We set the Boxed option to False and plot the surface again. Evaluate the cells to compare the graphics.
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This restores the old settings.
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