Automatic upscale of images?

After the original images are uploaded to your Cloudinary account, you can add them to your post after editing them in your Cloudinary Media Library.
The maximum value that can be set by the ‘Width’ and ‘Height’ sliders is the original image’s dimensions. However, you can manually specify a number by your preference, even bigger than the original image.
Changing just either the ‘Width’ or the ‘Height’ parameters (one without the other) will preserve the image’s ratio.

However, you can manually specify a number by your preference, even bigger than the original image.

Is that by using the sliders, or somewhere else?

The sliders are used only for width and height that are equal or smaller than the original dimensions. You can click on the boxed number itself, then enter the required number.

Ok, that’s clear . Thanks