Custom Field Suite is built in Forge, because we want to support Atlassian's new cloud app development platform that helps developers to build trusted and scalable with Atlassian-hosted compute and storage.
Our team monitors the Forge Changelog to keep track of important changes and What’s coming to try out the latest beta functionality in Forge.
Create and configure the custom field
To create and configure custom fields, you must be logged in as a user with Jira Administrator permissions.
Go to Settings → Issues → Custom Fields
Create a new custom field of type CFS - Multilevel select picker
Add name and description
Associate the field to the appropriate screens. You must associate a field to a screen before it will be displayed.
Click on 1 Context and click Create, edit or delete contexts on the dialogue.
Click Edit custom field config.
Create cascading list values and click on save.
Steps 5, 6 and 7 are not required for custom field types where default values are already set in the app configuration screen. (i.e. MoSCoW, T-Shirt, Issue Rating)