When a field is created on a form that is linked to a Keyword Type configured to use a drop-down list, the field automatically has a drop-down control associated with it and the Data Set field displays Using Keyword Data Set. This is displayed even if the Keyword Type is only configured to use a drop-down list and does not have a data set configured. Keyword Types configured with the Allow Drop-Down Lists option selected, but not configured to use a Data Set, display all keyword values currently associated with the Keyword Type.
If you want to limit the number of values displayed in the drop-down list at once, enter the maximum number of values you want to display in the Maximum Results setting for the field in the Forms Designer. If this setting is set to 0, all available values will be returned.
If the Value must exist property option is selected, the value must exist as a value associated with the Keyword Type in order to save data in the field. If the Value must exist option is unchecked, the value does not have to exist as a value in order to be saved.