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based on an earlier version of the Wolfram Language.
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[an error occurred while processing this directive] $FrontEnd

  • $FrontEnd is a global variable that specifies to what front end object, if any, the kernel is currently connected.
  • $FrontEnd is either a FrontEndObject, or Null.
  • You can use Options and SetOptions on $FrontEnd to read and set global options for the front end.
  • See the Mathematica book: Section 2.10.4.
  • See also: $Notebooks.