# Page Not Found

The URL `apps/app-builder/custom-sidebar` does not exist.

You might be looking for one of these pages:
- [Custom sidebar menu](https://dev.ubidots.com/apps/custom-sidebar.md)
- [Sidebar](https://dev.ubidots.com/apps/styling-with-css/application-css/sidebar.md)
- [XML v1.0 (deprecated)](https://dev.ubidots.com/apps/custom-sidebar/xml-v1.0-deprecated.md)
- [Getting started](https://dev.ubidots.com/apps/pages/getting-started.md)
- [XML v2.0](https://dev.ubidots.com/apps/custom-sidebar/xml-v2.0.md)

## How to find the correct page

1. **Browse the full index**: [/sitemap.md](https://dev.ubidots.com/sitemap.md) - Complete documentation index
2. **View the full content**: [/llms-full.txt](https://dev.ubidots.com/llms-full.txt) - Full content export

## Tips for requesting documentation

- For markdown responses, append `.md` to URLs (e.g., `/apps/custom-sidebar.md`)
- Use `Accept: text/markdown` header for content negotiation