How do I control output image sizes when using SDXL ControlNet?

When using SDXL ControlNet (e.g., canny control), the output image size is determined by the explicit width and height parameters in your API request:

The input control signal image will be automatically:

• Resized to fit your specified dimensions
• Cropped to preserve aspect ratio

Example: To generate a 768x1344 image, explicitly include these parameters in your request:

{
    "width": 768,
    "height": 1344
}

Note: While these parameters may not appear in the web interface examples, they are supported API parameters that can be included in your requests.