Library /sys$common/syshlp/lse$menu.hlb EXACT_SUBSTITUTE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  Syntax:  EXACT SUBSTITUTE search_string replace_string
              substitute_type

  Replaces occurrences of the search string with the exact form of the
  replace string.

  This command ignores the case of characters in the search string and
  replaces it exactly with the specified replace string.  It searches
  for the string in the current direction.  LSE prompts you for
  confirmation before the replacement is made.