Although, there is plenty of space left in the Camera Control window to display the full preview image, please try if you get the full preview window if you close the “Laser” window by clicking on the X to see if it’s an issue of a limited screen resolution.
In my opinion, that’s no issue at all. What would you use this picture for? It’s just useless. You position your objects and then click on “update overlay”. The overlay is interesting, the live picture does not provide any information (in my view). I’d just ignore it.