Use Free Form property

Use the Use Free Form property to define and use your own custom data types and formats for use in the associated component.

Setting Description
True Data type and format definitions for the component are specified with the Data Type property and the Format property, rather than with properties normally used.
False Default. Data type and format definitions for the component are specified in the normal way.
Note:  If you use the Use Free Form property and you want to set conditions for Enabled When, Required When, or Visible When properties, you must do so using the appropriate keywords in the Data Type attribute field for the Use Free Form property. Setting the Use Free Form property value to True disables those property fields in the Component properties sheet.