It’s hard to tell what you’re asking. Aspect Ratio is defined as the width compared to the height of the image, and there is a convention to state it in the order
width:height. If you wanted to swap them you have to rotate the image so that the width becomes the old height and the height becomes the old width. Swapping the order of the ratio to be stated as
height:width is against convention, and a very unusual thing for most software to allow.
9 hours ago