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

  Choose the Extend From menu item from the Modify pull- down menu to
  add another layer of information to the graphical display.  The new
  layer will show nodes that extend from the selected node(s).