43. Customizing the SiriKit Intent User Interface
Each SiriKit domain will default to a standard user interface layout to present information to the user during the Siri session. In the previous chapter, for example, the standard user interface was used by SiriKit to display to the user the message recipients and content to the user before sending the message. The default appearance can, however, be customized by making use of an Intent UI app extension. This UI Extension provides a way to control the appearance of information when it is displayed within the Siri interface. It also allows an extension to present additional information that would not normally be displayed by Siri or to present information using a visual style that reflects the design theme of the main app.