Library /sys$common/syshlp/lse$clihelp.hlb ENTER, LINE, Qualifiers, /END  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Indicates that the cursor should be left at the end of the first
    line. If you start with the cursor at the end of the original
    line, the /END qualifier causes the cursor to stay there.

    If you start with the cursor at the beginning of a line, the
    /END qualifier adds a new blank line before the current line and
    positions the cursor on that blank line.

    If you position the cursor within a line, specifying the /END
    qualifier splits the line in two leaving the cursor at the end of
    the first line.