Editor/MyEditorMenu.cs
using System.Linq;
using Editor;
using Sandbox;
using Sandbox.DataModel;

public static class MyEditorMenu
{
	[Menu( "Editor", "Project/Better Settings..", "tune", Priority = -4 )]
	static void OpenProjectSettings()
	{
		var window = new ProjectSettingsWindow( EditorWindow );
		window.Size = new Vector2( 1280, 720 );
		window.Show();
		
	}
}