A connector is a line that visually links shapes. It looks like a line, but stays connected to the shapes you attach it to.
Draw a connector
Change the formatting of a connector
Move a connector
Do one or both of the following:
To override the automatic locking, hold down ALT as you drag the end. You can place the end wherever you want on the object, but the end will not be connected.
Automatically
reroute a connector to the closest points between shapes
Notes
Locked or attached connectors appear as red circles.
Unlocked connectors appear as green circles.
If the connector has a yellow adjustment handle, dragging the handle will change the shape of the connector but not detach it.