> ## Documentation Index
> Fetch the complete documentation index at: https://docs.supernote.com/llms.txt
> Use this file to discover all available pages before exploring further.

# generateMarkThumbnails

> Generate a thumbnail for a DOC mark page.

```ts wrap theme={null}
static generateMarkThumbnails(
 markPath: string,
 page: number,
 pngPath: string,
 size: Size
): Promise<APIResponse<boolean>>;
```

**Parameters**

| Parameter  | Type                                                    | Description                            |
| ---------- | ------------------------------------------------------- | -------------------------------------- |
| `markPath` | `string`                                                | DOC file path                          |
| `page`     | `number`                                                | Page index (starts from `0`)           |
| `pngPath`  | `string`                                                | Output PNG path (must end with `.png`) |
| `size`     | [`Size`](/en/api-reference/supernote-plugin/types/size) | Output image size                      |

**Returns**

* [`APIResponse<boolean>`](/en/api-reference/supernote-plugin/types/api-response):
  `result === true` indicates generation succeeded

## Example

```ts wrap theme={null}
import { PluginFileAPI } from 'sn-plugin-lib';

/**
 * Example: generate a mark thumbnail.
 */
export async function exampleGenerateMarkThumbnails() {
 const markPath = '/storage/emulated/0/Note/demo.pdf';
 const page = 1;
 const pngPath = '/storage/emulated/0/Note/out/mark.png';
 const size = { width: 512, height: 512 };

 const res = await PluginFileAPI.generateMarkThumbnails(markPath, page, pngPath, size);
 if (!res.success) {
 throw new Error(res.error?.message ?? 'generateMarkThumbnails call failed');
 }
 return res.result;
}
```