how do I add an existing issue to an epic?

[Meredith Volk]

I found a doc that mentions using "Plan mode" but I don't see this as an option in my board. Presumably that's because I don't have permission to access Plan mode. Is that the case? Or is the doc just missing some steps? 

[Joshua Lind]

This simple core task is clearly painfully difficult to find and still annoying to use. It's truly staggering how Atlassian consistently botches UI by burying key features. Noisy interfaces poorly prioritized.

[Ollie Guan_携程]

Hi @Meredith Volk,

Are you using a Scrum Board or a Kanban Board?

In Scrum Board mode you can choose to show the Epic panel in the board configuration,and Match existing Issue and Epic by dragging cards.

[Meredith Volk]

I'm using a Kanban board but I think I figured it out! We have a custom field called Epic Link on issues. I can type the epic in there and link it that way.

[Ollie Guan_携程]

That's true, it can also be implemented through Epic Link.

[Guido Zardo]

In case the Epic Link was not showing you can unhide it in the issue layout settings

[Tracy Kabeshita]

Figured it out from these steps

https://community.atlassian.com/t5/Jira-Core-questions/How-do-I-add-an-existing-story-to-an-epic/qaq-p/123906

[Jay Lal]

This is the best answer, that actually worked

[Sandhya Nagarajan]

Easiest way is to go the issue and `link the epic using `link-issues` to it by selecting `Created by` in the drop-down.

[Tracy Kabeshita]

I attempted this and it only "links" them, it doesn't make them Epic issues.  I selected "relates to" as the way to link them.

This is what I would like to see: