How do I add existing Jira Epics to an already created Plan?

[Joel Feldman]

I must be missing something obvious but I can't see how to add existing Jira Epics to an already created Plan.   (When I created the Plan I was getting server timeouts. The only way around that was to created the plan without any Epics.).  I am running Portfolio 2

[Joel Feldman]

Nevermind.  I found that wizard through:

1. <plan> ...  Configure
2. Issues sources
3. Edit sources

[Ludovic Allouch]

4 years later, this auto-answer saved me from a bad week-end ;)

[Grant Willison]

the accepted answer doesn't work. Neither do jira plans