Library /sys$common/syshlp/EXAMPLES/LSE/LATEX_HELPLIB.HLB  —  LaTeX  Commands  Environments  picture  \frame
  \frame{ ...  }

  The \frame command puts a rectangular frame around the object
  specified in the argument.  The reference point is the bottom left
  corner of the frame.  No extra space is put between the frame and the
  object.
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