"When you want to start creating a Diagram, you need to make the
Drawing toolbar visible by clicking View -- Toolbars -- Drawing.
You can do this in Writer, Impress, or Draw; however (for reasons
I'm not sure of) the Drawing toolbar in Writer lacks the special
line connectors that make it much easier to connect shapes and
objects. If you want to make an organizational chart or diagram
that contains shapes connected by lines for use in a Writer
document, you can create it in either Draw or Impress and then copy
the final product into Writer."