Game Start screen: customizing?

Hello there,
I’m using the Game Component, but I cannot find out how to customize the starting screen. For example, how can we center the component if we want it half width? How to center the start button?
Thank you for your help,

Bump on this one. I’m also trying to center the start button on the component, but there doesn’t seem to be an option for it anywhere?

Following this thread. I’m having the same issue as well.