When you create a brand new list, you will initially be taken to the classic list edit view as shown in the Create list page of this guide. Click on the Save Draft button to go to the beta list edit mode.
For existing lists, you will be immediately in the beta edit mode when you open the list.
The new edit mode is not yet the standard interface but you can be an early adopter and help us test out the new features.
If you would like to use the new edit interface, contact your Academic Liaison Librarian and ask for an invite.