Percentage base sizes

Being able to size height and width as % of screen size.

Urgently needed for professional UI appearance! The same 20px font that looks fine on a small display (let’s say 360px wide) but amateurish tiny on a iPad Pro 1024px wide.

YES! This is such a needed feature. I love that it somewhat auto adjusts for screen sizes, but the ability to define it is urgently needed.