Available Locations

The tree view is the default and principal view and it displays tree structures of linked issues, sub-tasks, epics and portfolio hiearchies  on the JIRA:

• Issue Detail page and the
• Agile Board: Detail View

Issue Detail View

A new Links Hierarchy tab panel is added on the JIRA issue page:

you You can use the Atlassian's new user experience design, it's available from the drop-down menu:Image Removed

Agile Board - Detail view

If the Jira Software application is installed then a new panel is added into the Board Detail View of the for the Scrum Plan:

it's available from the drop-down menu:

(Necessary to have the Atlassian's new user experience design activated)Image Removed

Section
border true
Column width 50% Image Added Column width 50% Links Hierachy has been moved to web panel. Image Modified

...and also into the Kanban Work boards:

it's available from the drop-down menu: 

(Necessary to have the Atlassian's new user experience design activated)