The Supporting Data page lets you create the lists and categories the drivers can choose from in Drive. For instance, there could be a list that helps categorize vehicle damage that is called "Damage Categorization," with the categories Disabled, Functional, Other Property Damage, and None. Then, in the Task Library, if there was an accident task, one of the questions that could be required of the driver may be Damage Categorization, and the driver's choices would be Disabled, Functional, Other Property Damage, and None.
To add items to a list, tap the list with which you want to work and then tap Add List Item. Enter a Value, the Text you want to show when the list displays, and choose a Child List, the list to which you want this item to be added. Save your new list item.