After you add a user reference to a form, you can configure the way that users interact with it. For example, you can display the list of users in your application as a list or as an autocomplete that returns a list of search results.
In the explorer panel of Designer Studio, click Cases and then click the name of a case type.
On the Life cycle tab, click an assignment or an approval step.
Click Configure view.
Click the Gear icon in the row of the user-reference field.
Select a control type from the list that is displayed.
Options include:
Search — Prompts users to search for an existing user by entering a full name or operator ID in an autocomplete field.
Dropdown — Prompts users to select the full name of an existing user from a list.
Click OK.
At run time, users are prompted to select or search for an existing user, based on the control type that you provide. The result, a user ID, is stored in the property that is associated with your user-reference field.