> For the complete documentation index, see [llms.txt](https://docs.apryse.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.apryse.com/web/ui-customization/ui-customization.md).

# Customizing WebViewer UI

Elevate user experience with custom WebViewer UI configurations. Explore APIs to tailor document interactions using web. Optimize UI design efficiently. The Apryse Web SDK streamlines secure, serverle

WebViewer is an open source UI which offers extensive configurability and provides a comprehensive set of APIs enabling developers to customize and manipulate documents in various ways.

WebViewer can be customized through our robust API (recommended), or by forking and customizing the open source Github repo (advanced).

<a href="https://github.com/ApryseSDK/webviewer-ui" class="button primary">View on GitHub</a>

These guides will assist you in determining the optimal approach for implementing your customizations effectively.

## Get started

[Modular UI](/web/ui-customization/modular-ui/getting-started.md) Learn more about how to fully customize your UI with the default UI that WebViewer comes with.

[Customizing header](/web/ui-customization/modular-ui/containers.md#modular-header) To customize the header items when using the modular UI.

[Customizing popup](/web/ui-customization/customizing-popup.md) To customize the popup.

[Customizing style](/web/ui-customization/customizing-styles.md) To customize the style or theme.

[Localization](/web/ui-customization/localization/languages-and-internationalization.md) To leverage i18next for languages and internationalization support.

[Themes](/web/ui-customization/customizing-styles.md) To customize the style or theme.

[Hide/Show DOM elements](/web/ui-customization/hiding-elements.md) To hide DOM elements initially and dynamically.

[Advanced customization](/web/ui-customization/advanced-customization.md) To branch or fork the source code and make your own unique customizations.

[Legacy UI](/web/ui-customization/legacy-ui/legacy-ui.md) Learn more about WebViewer's legacy UI (deprecated).


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## 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, and the optional `goal` query parameter:

```
GET https://docs.apryse.com/web/ui-customization/ui-customization.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

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.