The List attribute includes an option called Category\Subcategory. If this option is enabled, list items will be shown in a hierarchical view where the subcategory changes based on the chosen category. For this to function properly, category and subcategory items must be separated by the backslash (\) character.
In the example below, Category shows the entry to the left of the ‘\’ and the Subcategory shows what is to the right of the ‘\’. If this option is checked and entries are populated in the list options, users will be able to choose from a list of categories and subcategories like states\cities (i.e. Florida\Orlando).