ThreeNippledWanda

I've never bothered with this feature but often wondered how exactly it works. The description says you can "pass in w/h" to scale the dimensions of an image, but there's only one line and fractions convert to decimals.

gamingislove

It's basically describing the Unity function that's being used here (legacy GUI only).

Passing in w/h means that width divided by height would be the image aspect.