problem with centering buttons

Hello, I have a problem with centering buttons on the screen. For example, I have 6 to 8 buttons, but their position is not in the center of the screen. How can I make them dynamically centered on different screen sizes?

I am using this code:

Hello, I have a problem with centering buttons on the screen. For example, I have 6 to 8 buttons, but their position is not in the center of the screen. How can I make them dynamically centered on different screen sizes?

I am using this code:

Construct handles this in most cases, also would center not be lauoutwidth / 2 ?