I'm using the 'Set Layout Scale' action to zoom in. All my layers have a Scale Rate of 100, and my game is set to the fullscreen mode Scale. Then I have an action to always set the camera to the origin (0,0) and that works fine.
But if I change any layer Scale Rate to any other value, the origin changes place, and the game screen gets out of center. Eg, if all layers have a scale rate of 100, the origin is at the top-left corner. If I set the Scale Rate of any layer to 0, the origin changes to the center of the screen.