What does "downscale" mean in manual crop?

I've enabled cropping, and downscale. The cropping works great, but I'm not sure about downscaling. Does it mean that the image quality is being downscaled? Or is it supposed to resize the image? Anyhow, what I would like is for the user to upload and crop the image, and then it would be resized to a certain maximum size, respecting the original aspect ratio. Is that possible?

Setting crop to "200x300" will add "resize" operation with a value equal to 200x300 to the resulting CDN URL if cropping area is exceeding 200x300 px, otherwise resulting image size will be equal to the size of the cropping area.