If you want further control over how the user interface is rendered, you can add an editor template for your class by creating a partial MVC view, and name the view as your model, such as _{nameOfMyModelClass}.ascx_. The application can look for the view in two places:

• If your criterion is part of a registered module, the first search path is: _{yourModuleRoot}/Views/Shared/EditorTemplates/{nameOfMyModelClass}.ascx_

• If the view is not found in the module folder or if your criterion is not part of a module, the next search path is: _~/Views/Shared/EditorTemplates/{nameOfYourModelClass}.ascx_

In your editor template, you can import the `EPiServer.Personalization.VisitorGroups` to the `DojoEditorFor` method. The `DojoEditorFor` method creates a widget that handles loading and saving of values from/to a specified model class property. `DojoWidgetFor` discovers and makes use of any `DojoWidget` attribute settings for model class properties. If you do not use `DojoWidgetFor` to create edit controls for your properties, you need to handle the loading and saving of values yourself.

The following editor template shows an example using the `DojoWidgetFor` method, where two different overloads are used. The first call only specifies the name of the model class attribute; the second call uses the overload with the most number of parameters. A full range of overload exists between these two extremes.

## Custom script

The `VisitorGroupCriterion` attribute has a `ScriptUrl` property, where you can specify a script file that is used when creating the settings user interface. The `ScriptUrl` should contain a JavaScript object that overrides one or more of the following methods:

• `createUI()` – Called to create the user interface for the criterion.

• `validate` – Called when the user tries to save a visitor group.

• `getSettings` – Called when the visitor group is saved to gather the data to save.

• `uiCreated` – An event that is raised when the user interface has been created.

The following script shows an example where these methods are overridden: