Adding a single-value field to your data model
Add a single-value field to your data model to store an individual piece of information. You can then reference this field on a form to collect a value from users at run time.
For example, you can define a Phone field type and then add it to a form to prompt users to enter their home telephone number.
- 
        Access the data model for a data type or a case type, based on how the field will be
          used in your application.
        - To view fields in a data type:- In App Studio, click the Open runtime toolbar icon.
- Click Turn editing on.
- In the navigation panel, click Data to display the Integration Designer.
- Click the name of a data type.
- Click the Data model tab.
 
- To view fields in a case type:- In App Studio, click the Open runtime toolbar icon.
- Click Turn editing on.
- In the navigation panel, click Cases to display the Case Type Explorer.
- Click the name of a case type.
- Click the Data model tab.
- To display fields that are inherited by your application, click Show reusable fields.
 
 
- To view fields in a data type:
- Click + Add field.
- Enter the name of the field.
- In the Type column, select an option from the Simple or Fancy category that represents the type of data that is stored in the field.
- Click Done.
Note:  Some single-value fields, such as picklists, require configuration before they are
        fully functional. Click the Gear icon to view the available options
        for a field.