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

  Syntax:  COPY APPEND user_paste_buffer

  Copies the selected text to the end of the buffer or clipboard.

  This command appends the currently selected text to either the
  designated buffer or to a default location (the DECwindows clipboard
  or paste buffer).