Hello, I'm new to the UI Toolkit. I'm trying to make some UI for a simple iphone program with a ListView of Foldouts. I'm struggling to figure out how to resize the arrow icon, when I select it in UIBuilder, the child elements of the Foldout are all greyed out and can't be altered. So i tried to start manually adding selectors to modify the dimensions of the image, and I was able to modify the width/height of the container the image is in, but the original image itself doesn't change size, just the space around it grows. I've tried the -unity-background-scale-mode settings, but they don't seem to change anything to me, please help. I may be going about this entirely the wrong way, but I also can't seem to figure a way to duplicate the foldout so that i can edit the values or even the background image (in case i want a different image entirely) but can't even do that.