Library /sys$common/syshlp/dtmplayrec.hlb PlayRec, GeneralDB PopForm, toggles Form, toggles RowCol, ShowLines Tgl  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  The Show Script Lines toggle allows you to choose to
  show, in the Message area, information on each script
  line as it is executed during play of a script.