BUILT-IN WOLFRAM LANGUAGE SYMBOL
is an option for Cell that specifies whether styles that are specified to be automatically used for various syntactic and other constructs should be shown.
- The default setting is ShowAutoStyles->True.
- Details of automatic styles can be specified in the setting for AutoStyleOptions.
- For example, unmatched delimiters such as brackets are by default shown in purple.
Create a raw box structure with an unmatched brace:
Compare a cell that automatically highlights the unmatched brace with one that does not: