How to add an existing issue to a Portfolio plan?

[hayala]

Using Jira 7, self-hosted. Portfolio 3.5

I created a plan, added a few issues, and everything is great. But then I noticed that I forgot to add one issue to the scope and I cannot find any way to add more, other than the "Create issue" button.
To be clear, I do not want to create a new issue, I want to add an already existing issue to my plan.

[Cristiano Mariano]

If you go to Issue Sources and click Edit, you will have the same options you had when you created the plan.

[hayala]

Thank you, Cristiano. That did it, I was hoping there was a simpler way, but this solution worked.