# Page Not Found

The URL `v/10.latest-lts/extending/backoffice-ui-api-documentation` does not exist.

You might be looking for one of these pages:
- [API Documentation](https://docs.umbraco.com/umbraco-cms/reference/api-documentation.md)
- [Backoffice Entry Point](https://docs.umbraco.com/umbraco-cms/customizing/extending-overview/extension-types/backoffice-entry-point.md)
- [Backoffice Search](https://docs.umbraco.com/umbraco-cms/extending/backoffice-search.md)
- [Default Document Types](https://docs.umbraco.com/umbraco-cms/fundamentals/data/defining-content/default-document-types.md)
- [Legacy Documentation](https://docs.umbraco.com/umbraco-cms/legacy-documentation.md)

## How to find the correct page

1. **Ask a question**: /sitemap.md?ask=<question> - Complete answer with sources
2. **Browse the full index**: [/sitemap.md](https://docs.umbraco.com/sitemap.md) - Complete documentation index
3. **View the full content**: [/llms-full.txt](https://docs.umbraco.com/llms-full.txt) - Full content export

## Tips for requesting documentation

- For markdown responses, append `.md` to URLs (e.g., `/umbraco-cms/reference/api-documentation.md`)
- Use `Accept: text/markdown` header for content negotiation