Version: 2019.4
public bool maximized ;


Is this window maximized?

Setting maximized will make the Unity Editor as large as the Unity screen. If the window is undocked, this value will always be false and setting it will have no effect. This is handled by the GUILayout.Toggle option.

using UnityEngine;
using UnityEditor;

// The window size increases as full as Unity. // This only work when the editor window is inside Unity.

public class MaximizedExample : EditorWindow { [MenuItem("Examples/Maximized")] public static void Init() { GetWindow<MaximizedExample>("Maximized"); }

void OnGUI() { maximized = GUILayout.Toggle(maximized, "Maximize window"); } }