To open a list of data types, click the Data Types button on the toolbar or choose Data Types from the Resources menu. In the Data Types window, select a data type and click Open. The Data Type Definition window will appear, as shown in the following illustration.
The data type’s name appears at the top of the window. The Control Type field specifies the function of the data type, indicating how it will display and store data. The other fields in the window specify the additional characteristics of the data type. The following sections describe the data type characteristics you can change with the Modifier.