How do I associate defects/stories with other defects/stories?

Discussion created by 6c05f1001dc4c67c996e7083e4474330 on Mar 27, 2015
Latest reply on Apr 1, 2015 by 6c05f1001dc4c67c996e7083e4474330
On https://help.rallydev.com/defects it states that "Use the sidebar to link to any associated artifacts related to the current defect." but that is not clear on exactly how to do this.

If a new defect is opened, I want to be able to create a 2-way relationship to past defects that were related.