---
title: \(Legacy\) Virtual Agent Designer interface reference
description: The Virtual Agent Designer interface lets you create, modify, test, publish, and localize topics, topic blocks, and custom controls.
locale: en-US
canonical_url: https://www.servicenow.com/docs/r/conversational-interfaces/vad-reference-nlu.html
release: brazil
topic_type: concept
last_updated: "2026-09-10"
reading_time_minutes: 1
breadcrumb: [NLU reference, \(Legacy\) Virtual Agent for NLU, Conversational Interfaces]
---

# \(Legacy\) Virtual Agent Designer interface reference

The Virtual Agent Designer interface lets you create, modify, test, publish, and localize topics, topic blocks, and custom controls.

Virtual Agent Designer provides the following views. Some tabs may not be available, depending on how you configured your instance or the type of topic you are working with.

-   **[\(Legacy\) Virtual Agent Designer Topics page](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/brazil/markdown/conversational-interfaces/vad-prev-topics-page.md)**  
The Virtual Agent Designer legacy home page lists cards for available topics in your instance.
-   **[\(Legacy\) Virtual Agent Designer All prebuilt topics page](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/brazil/markdown/conversational-interfaces/vad-additional-topics-list.md)**  
When you install prebuilt conversations, such as ITSM Virtual Agent, some topics may not appear on the home page unless you install their dependent plugins. This page shows the additional topics that are available.
-   **[\(Legacy\) Create a topic form](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/brazil/markdown/conversational-interfaces/vad-topic-creation-form-nlu.md)**  
The Create a topic form is used to set the properties for a new conversational topic for Virtual Agent.
-   **[\(Legacy\) Topic Properties tab for NLU](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/brazil/markdown/conversational-interfaces/vad-topic-properties-tab-nlu.md)**  
Use the **Topic Properties** tab to identify a topic and how it's used. You can control who uses the topic and what channels it can run in.
-   **[\(Legacy\) Topic NLU Intent tab](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/brazil/markdown/conversational-interfaces/vad-topic-nlu-intent-tab.md)**  
You can edit and refine ServiceNow NLU models from within Assistant Designer. When a conversation topic is bound to an associated NLU model and intent, use the **NLU Intent** tab to review and edit utterances and associated entities.
-   **[\(Legacy\) NLU Topic Languages tab](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/brazil/markdown/conversational-interfaces/vad-topic-languages-tab.md)**  
Use the **Languages** tab to view the topic's translation status for languages that have been activated in Virtual Agent. If NLU is enabled on your instance, you can also view model mappings for each language.
-   **[\(Legacy\) Virtual Agent Designer user input controls for NLU](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/brazil/markdown/conversational-interfaces/va-user-inputs-nlu.md)**  
Use the collection of input controls provided by Virtual Agent Designer to prompt and capture information from the user in a conversation.
-   **[\(Legacy\) Virtual Agent Designer bot response channel support for NLU](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/brazil/markdown/conversational-interfaces/va-bot-responses-nlu.md)**  
Virtual Agent Designer offers various controls for displaying bot responses in a conversation. Because the bot responses occur in third-party platforms, the format for each output may vary.

**Parent Topic:**[\(Legacy\) Virtual Agent NLU reference](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/brazil/markdown/conversational-interfaces/va-parent-reference-nlu.md)