Right-click the annotation text and select Add Leader from the contextual menu.
Click the face as shown to begin the leader (arrow end).
If needed, position the leader at the desired location by dragging it.
To add a breakpoint, select the manipulator at the extremity of the arrow end and select the Add a Breakpoint from the contextual command.
To add a leader from the breakpoint, select the breakpoint and select the Add an Extremity contextual command.