I understand that these properties in the manifest:
can remove the title bar. However, I constantly check the Graphical Layout when I am modifying my app. When I look at the Graphical Layout I still see the title bar. I want to remove the title bar in a way that I don't have to see it during the development of the game.
In the Design Tab, click on the AppTheme Button
Choose the option "AppCompat.Light.NoActionBar"