Extras
Allows you to upscale the image.

Scale factor
Scale by- how many times to upscale the pictureScale to- alternative variant: to what size upscale the picture.
Upscaler 1,2
Here you can select the upscalers that we will use. You can use either one or two (for better quality)
Personally, I settled on R-ESRGAN 4++ as the first upscaler and SwinlR_4x as the second.
Upscaler 2 visibility
Adjusts the effect of the second upscaler on the final picture, you can turn it down if it seems too strong.