Responsive Image with Max Original Size

Responsive Image with Max Original Size

On Zoho Learn I see two image dimension options: "Original Size" and "Fit to Width". If I choose "Original Size" the image is not responsive to different screen sizes or devices. If I choose "Fit to Width" the image is responsive, but it can be larger than the original size on larger screens, which makes it look bad, because it stretches. I would like it to be responsive without being larger than its original size. It should only get smaller according to screen size, not bigger than the original size.