Editing, Disabling, and Deleting Items in a Tree Field
A user with the List Admin permission can edit a tree field by making changes to a category name and/or any of the list items in the category. A tree field can also be edited by adding new categories and list items. An entire category, as well as individual list items in the category, can be temporarily disabled if they will be needed again in the future, or permanently deleted if they will never be used again.