Toggling between fullscreen, maximized window, and smaller window

I can’t seem to get my game to switch to a maximized window where the window is docked to the top of the screen. I’m currently using a UI Slider to choose between these 3 options. My game is a 2D, top-down space shooter, so I want the game to not reveal any more of the level, so I have the window unable to be resized by dragging the sides, but I still want to support some screen variations. Currently I have a system to switch between Fullscreen, a 1920x1080 non-fullscreen window, and a 1024x576 window:

    public void setScreenSize(float size) {
            switch (size) {
                case 0:
                    Screen.fullScreen = true;
                    print("FULLSCREEN");
                    break;
                case 1:
                    Screen.SetResolution(1920, 1080, false);
                    print("MAXIMIZED WINDOW");
                    break;
                case 2:
                    Screen.SetResolution(1024, 576, false);
                    print("WINDOWED");
                    break;
                default:
                    Screen.fullScreen = true;
                    break;
            }
        }

This code works, but I’m not a fan of the 1920x1080 window as it can be moved around, part of the screen is cut off, and it doesn’t match everyone’s resolution. I tried to change the player’s settings through UnityEditor.PlayerSettings.fullscreenMode to change it, but that didn’t let me build it:

    public void setScreenSize(float size) {
            switch (size) {
                case 0:
                    Screen.fullScreen = true;
                    print("FULLSCREEN");
                    break;
                case 1:
                    UnityEditor.PlayerSettings.fullScreenMode = FullScreenMode.MaximizedWindow;
                    print("MAXIMIZED WINDOW");
                    break;
                case 2:
                    Screen.SetResolution(1024, 576, false);
                    print("WINDOWED");
                    break;
                default:
                    Screen.fullScreen = true;
                    break;
            }
        }

My error is: “Assets\Scripts\settingsMenu.cs(75,17): error CS0234: ‘PlayerSettings’ does not exist in the namespace ‘UnityEditor’ (are you missing an assembly reference?)”

Why does UnityEditor.PlayerSettings.fullScreenMode = FullScreenMode.MaximizedWindow;
not work? Is there anyway I can maximize the window through my script? Thank you in advance.

I’ve also tried Screen.fullScreenMode = FullScreenMode.MaximizedWindow; and that just glitched out a ton.

You can’t use UnityEditor in built games. The UnityEditor namespace basically only for writing editor extensions.
Try this code:

Screen.SetResolution(1920, 1080, FullScreenMode.ExclusiveFullScreen, 60);