Box position problem

I have a problem with calculating sprite position.

I use "Fullscrean in browser"="Scale outer"

In hud layout (parallax = 0,0) I have object and it should fill all the screen but not more, so it must start in left-top corner and end exactly in right-bottom corner.

But I dont knew how to do this with "Scale outer" and parallax = 0,0

https://www.dropbox.com/s/f1z4qwf13aej2a1/test.capx?dl=0

so it must start in left-top corner ...

Set position to ViewportLeft(layer);ViewportTop(leyer) ?

That work perfectly, thanks!

I was trying something like:

(-WindowWidth+OriginalWindowWidth*WindowHeight/OriginalWindowHeight)/2

(-WindowWidth+OriginalWindowWidth)/2

(-WindowWidth+OriginalWindowWidth)/(2*WindowHeight/OriginalWindowHeight)