> This page is for version v2025-04-21.
> For other versions, use one of these documentation indexes:
> - v2026-02-09 (default): https://docs.extend.ai/2026-02-09/llms.txt
> - v2025-04-21: https://docs.extend.ai/2025-04-21/llms.txt
> - v2024-12-23: https://docs.extend.ai/2024-12-23/llms.txt

> ## 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.

# Custom instructions for figure parsing

> Steer figure parsing with blockOptions.figures.customInstructions, injected into the vision model prompt that analyzes and summarizes each figure.

You can now provide custom instructions for figure parsing via `blockOptions.figures.customInstructions`. The instructions (up to 2,000 characters) are injected into the vision model prompt that analyzes and summarizes each figure, letting you steer descriptions toward your use case — for example, domain-specific terminology or details to always capture from diagrams.

Available on `parse_performance` >= `2.0.0` and `parse_light` >= `1.0.0`, with `blockOptions.figures.enabled: true`.

```json
{
  "config": {
    "blockOptions": {
      "figures": {
        "enabled": true,
        "customInstructions": "Describe all medical imaging figures using radiology terminology. Always note any visible measurement scales or annotations."
      }
    }
  }
}
```

In the dashboard, you can also configure figure custom instructions from the parser configuration panel in Studio.