Not sure you've experienced the same as me...
There is no centre if the screen size keeps changing. I need to do this at run time so that I can support a lot of screen sizes. With scale outer, it doesn't scale from the centre, it scales from an edge.
I could add it to a parallax layer, but if I don't know how many pixels the screens are different by, it's no use to me.
In this example, it could be anywhere between 100-200 pixels, but of course, there's no real way of knowing.
I'd have thought window width would be what I need... but it doesn't work at all, even in my C2 previews.