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Questions dealing with optional named arguments of Mathematica functions. Questions related to how to write functions with options (OptionsPattern), how to query options (Options and AbsoluteOptions) and option values (OptionValue), how to filter options (FilterRules), pass on options to internal functions (Rule and RuleDelayed), extract option values (Replace), set options globally (SetOptions) and how to change option values belong to here.

Questions about in what order/syntax should optional arguments be listed when calling (built-in) functions should use the tag .

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