Each item in a list is associated with a data value that represents the list item. By default, the values match the text for the list item. You can change these values, for example, to match existing values in a data source.When you choose to specify item values for the first time, the values will change to integer values starting with “1” for the first item. If you deselect the Specify Item Values option, the values will revert to match the list item text.