Library /sys$common/syshlp/dbg$help.hlb DEBUG, SET, EDITOR, Qualifiers, /CALLABLE_EDT  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Specifies that the callable version of the EDT editor is started
    when you use the EDIT command. Do not specify a command line with
    this qualifier (a command line of "EDT" is used).