This feature allows users to link lists together in a Parent / Child relationship, including displaying a child view in the parent's display form.
This feature allows you to configure which list to use as a Child from the Parent's List Settings page. Once you have set the relationship up, you can then see which items are associated with the parent from the parents View properties page (DispForm.aspx). You can then create new child items from the parent and it will be updated automatically.
For more details, please see the Documentation section.
- Create Views for the parent that embed the child items with collapsible sections (embedded grids).