> ## Documentation Index
> Fetch the complete documentation index at: https://docs.extend.ai/llms.txt
> Use this file to discover all available pages before exploring further.
>
> ## API version
> The current API version is `2026-02-09`, served at the site root (no version prefix in URLs).
> If this page URL contains `/2025-04-21/` or `/2024-12-23/`, you are reading an older API version.
> Prefer the current docs at https://docs.extend.ai/llms.txt unless the user explicitly needs that older version.
> Do not treat older-version pages as the source of truth for new integrations.

# Editing

> Ship your document processing with Extend. Get started with our APIs, SDKs, and guides.

## Docs

- [Editing Overview](https://docs.extend.ai/editing/overview.md): Editing detects and fills PDF form fields from data or natural-language instructions, then returns a completed PDF. Learn how it works, then run it in minutes.
- [Editing Configuration](https://docs.extend.ai/editing/configuration.md): Configure the Edit API: natural-language instructions, the edit schema and its extend_edit:* field properties, conditional logic, and advanced options.
- [Editing Response Format](https://docs.extend.ai/editing/response-format.md): Understand the edit run response: top-level fields, the edited file, filled values, processing metrics, and status values.
- [Editing Best Practices](https://docs.extend.ai/editing/best-practices.md): Practical tips for reliable PDF editing — choosing instructions vs schema, flattening, table parsing, and moving to production.
- [Editing Error Handling](https://docs.extend.ai/editing/error-handling.md): Handle Edit API errors: structured error fields, failure reasons, HTTP status codes, and sync vs async patterns.
- [Detect Form](https://docs.extend.ai/editing/detect-form.md): Detect fields in a PDF form and generate a ready-to-use edit schema with annotated positions, optional schema mapping, and conditional validation rules.