How do I move window on screen center?

So I used local storage to remember the window width/heigtht, so that when i access the game again it remember the choosen screen size, and it works fine.

The problem is, every time i run the game again, the window is not centered on the screen, but ismoved to the right side. I tried using the NW.js X/Y action (scrollx/y) but didnt work. Maximizing and unmaximizing didn't work either, is there a way to move it to the center of my monitor?

Thanks!

if your talking about the viewport you can't in editor.you have to move the screen at load time. best way I found was a small sprite put it in the center of x,y location you want the screen and add a scroll too position, now on the onstart of layout, run the scroll to image. this will position your viewport to the center of that image.