Problem with the "Allow resizing" action

Hello everyone. Do any of you know why if I disable resizing of the window, launch a preview, and move the window the title bar becomes thinner? Thanks.

In the second screenshot I moved the window slightly to the left.

Try to use adapt width and adapt height in your begin of the scene

What action exactly should I use?

Hi you can find actins for game resolution here

At the Begin of the scene just add action Automatically adapt the game resolution

Ok, I tried it, but the result is the same. Also I ran into a problem with the fullscreen when the window resizing is disabled.

You cannot activate fullscreen if you’ve disabled resizing.