If you set your widow size to say landscape (e.g. 640x480), then create a layout with the same size and use crop mode, the layout is always centered nicely.
However, if you now create a portrait layout, in say 480x640, and switch between them, your portrait layout is not centered and is unusable with parts off screen etc.
Here is a capx to demonstrate the effect, you will see that when you click to change to portrait mode, and resize your browser, its off center.
Is there a trick to get he layout in the middle (without changing from crop mode?) I could guess where to put the objects on the portrait layout and ignore the layout rectangle, but this is inaccurate and difficult.
Help much appreciated