Connection sites appear as blue circles as you pass the pointer over a shape.
Locked connectors will keep the shapes connected even when you move the shapes.
Note You cannot add text to a line or connector; use a text box (text box: A movable, resizable container for text or graphics. Use text boxes to position several blocks of text on a page or to give text a different orientation from other text in the document.) to place text near or on these drawing objects.
Change the color of a line or connector
Change the style of a line or connector