GitHub user dosubot[bot] added a comment to the discussion: Deck.gl map change
style directly on dashboard
<!-- Answer -->
To increase the PDF screenshot quality in Superset, you can adjust several
configuration options:
1. **Image Quality Settings**: Modify the `quality` parameter in the `Image`
interface to specify the quality of the image in the PDF export. Setting the
quality to a higher value will improve the image clarity.
```typescript
interface Image {
type: string;
quality: number; // Adjusts the quality of the image in the PDF
}
```
2. **Rasterized PDF Functionality**: Ensure that the rasterized PDF
functionality is enabled, which uses high-quality image settings. The image
type is set to 'jpeg' with the quality set to 1 (highest quality) in the
options object passed to the `domToPdf` function.
```javascript
const options = {
margin: 10,
filename: `${generateFileStem(description)}.pdf`,
image: { type: 'jpeg', quality: 1 },
html2canvas: { scale: 2 },
excludeClassNames: ['header-controls'],
};
```
3. **WebDriver Configuration**: Enhance the resolution and quality of
screenshots by configuring WebDriver settings. Use parameters like
`--force-device-scale-factor=2.0` and `--high-dpi-support=2.0` in
`WEBDRIVER_OPTION_ARGS` to achieve higher DPI and scaling.
4. **Wait Times**: Adjust `SCREENSHOT_LOCATE_WAIT` and `SCREENSHOT_LOAD_WAIT`
settings to ensure that the page is fully loaded before capturing the
screenshot. This helps in capturing accurate and high-quality images for PDF
exports.
By configuring these settings, you can improve the quality of PDF screenshots
in Superset
<sup>[[1]](https://github.com/apache/superset/blob/master/superset-frontend/src/types/dom-to-pdf.d.ts)</sup><sup>[[2]](https://github.com/apache/superset/blob/master/superset-frontend/src/utils/downloadAsPdf.ts)</sup><sup>[[3]](https://github.com/apache/superset/blob/master/superset/commands/report/execute.py)</sup><sup>[[4]](https://github.com/apache/superset/blob/master/superset/config.py)</sup>.
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GitHub link:
https://github.com/apache/superset/discussions/32149#discussioncomment-13130870
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