Select a connector.
Then the Shape Format context menu will be shown automatically.
Switch to the Shape Format menu, then you can set the Shape Outline, Weight, Dashes, Arrows for the connector.
Tips: You can also use the Shape Format property sheet to Format the connector.
Right-click the connector then choose the "Shape Format..." item.
Make connectors curved, angled, or straight
Add, Move, or Delete Connection Points
Add arrows, or other line ends to a connector
Add, move, or rotate text on a connector