# Page Not Found

The URL `flipbook/enrichment/popup-frame` does not exist.

You might be looking for one of these pages:
- [Popup Frame](https://docs.ipaper.io/flipbook-enrichment/popup-frame.md)
- [Popup Content](https://docs.ipaper.io/flipbook-enrichment/popup-content.md)
- [GetPaperUrlFromID](https://docs.ipaper.io/flipbook-backend-api/paper/get-paper-url-from-id.md)
- [UploadFile](https://docs.ipaper.io/flipbook-backend-api/media/upload-file.md)
- [GetPaperIDFromUrl](https://docs.ipaper.io/flipbook-backend-api/paper/get-paper-id-from-url.md)

## How to find the correct page

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

## Tips for requesting documentation

- For markdown responses, append `.md` to URLs (e.g., `/flipbook-enrichment/popup-frame.md`)
- Use `Accept: text/markdown` header for content negotiation