Library /sys$common/syshlp/edthelp.hlb SET, TERMINAL, HCPY  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 HCPY stands for hardcopy.  EDT considers a terminal hardcopy if it is
 not a VT100 or a VT52.  On such terminals change mode does not use the
 screen as a window onto your buffer, but instead shows you the current
 line with the cursor position indicated.  You type NOKEYPAD commands and
 EDT will keep you informed by printing the current line after each
 command.