How can I modify summary screen for Jira Plans (ex. Advanced Roadmaps)?

[Michał Osowski]

I'm familiar with modifying screens in Jira, yet I seem not to be able to find a way to modify the screen that is displayed after clicking on an Issue in Jira Premium Plans (ex. Advanced Roadmaps). Do you know a way (if it differs) or a name of the dialog attached (if it's the same as for other screens) in which I can modify this view (the goals is to add start and due date). The display in question can be seen below. Please mind that what I have trouble changing is the screen available in Plans, not in any other part od the system.

Thanks a lot!
Best,
MDO

[Dave Mathijs]

Hi @Michał Osowski , welcome to the Atlassian Community!

Which permission do you have in Advanced Roadmaps? Do you get this pop-up window when you click on the issue key of the Epic in the plan?

[Michał Osowski]

Hi there. 

I am organisations super-admin, the same goes for Advanced Roadmaps – I am admin. there as well.

I get this dialog box after I click on any title of the issue for all of the issue types. I would like to add 2 fields (start and due date) to those screens.

Thanks a lot for inquiring!