Description

Whether or not this window is maximized?

To maximize the custome Editor window to the size of the Unity screen, set maximized. It works only when the custom Editor window is docked within Unity.

using UnityEditor;
using UnityEngine;
using UnityEngine.UIElements;

public class MaximizedExample : EditorWindow
{
    [MenuItem("Examples/Maximized Window Example")]
    public static void ShowExample()
    {
        MaximizedExample wnd = GetWindow<MaximizedExample>();
        wnd.titleContent = new GUIContent("MaximizedExample");
    }

    public void CreateGUI()
    {
        var toggle = new Toggle("Maximize window");
        toggle.value = this.maximized;
        rootVisualElement.Add(toggle);
    }
}