Library /sys$common/syshlp/edthelp.hlb KEYPAD, VT100, 127  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 DELETE

 Deletes the character preceding the cursor and stores it in the delete character
 buffer.  When the cursor is at the leftmost character position on a line, the
 line terminator to the left is deleted and the text on that line is moved to the
 right of the text in the line above.