Lines and connectors
Lines and connectors enable you to draw lines between objects and connect them in your diagram. They are most valuable when you already have other objects in your diagram. You draw both the same way (see Adding lines and connectors). Once drawn, you can format and move them.
Connectors
Connectors draw a line forced to turn at right angles where necessary.
Lines
Unlike connectors, lines draw only perfectly straight lines, with no bends or corners. But you can still use them to link connection points on shapes, if a perfectly straight line is appropriate for your diagram.