# User Interface With Rierino, it is possible to design different admin UI apps for different business domains and use cases, by defining following main elements: * **App:** Each app defines a set of user screens and navigation menus, typically mapping to user profiles and roles * **UI:** Each UI represents a data entry user screen, where generic widgets and listers allow manipulation of data of any kind * **Option:** Each option represents the list and properties of options listed in drop-down widgets * **Translation:** Contains translations for all common and business domain specific labels * **Icon:** Contains all SVG icon definitions used across the platform * **Style:** Allows configuration of custom CSS for styling and changing color theme {% embed url="" %} In addition to these elements, design application also includes "component" screen for defining list of editors and filters available within the platform, which is typically not modified unless new custom editors are developed. While it is possible to extend the scope of apps and user screens with new component and page development for highly specialized business requirements, Rierino is shipped with elements which address most business needs. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.rierino.com/design/user-interface.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.