/START_POSITION
       /NOSTART_POSITION

    Specifies whether to pass the number of the source line to the
    editor. /START_POSITION is appended to the command line that is
    also passed to the editor with each subsequent EDIT command.
    /NOSTART_POSITION is the default, unless spawned LSEDIT is
    selected. In that case, /START_POSITION is the default.