How to change connector type for the flowchart
To change the connector type, it is not necessary to make several steps like to change shape (see How to change flowchart shapes), you just need to:
1. Select the connector you want to change:
2. Right-click in the connector, then in the popup menu, in the Connector Types list, choose connector type:
The connector type will be changed:
See also this tip in French: Comment changer le type de connecteur pour un diagramme.