Version: 2018.2
public static void DisplayPopupMenu (Rect position, string menuItemPath, MenuCommand command);

Description

Displays a popup menu.

Menu is shown at position pos, generated from a submenu specified by menuItemPath using a MenuCommand as menu context.

using UnityEditor;
using UnityEngine;
using System.Collections;

// Shows the Assets menu when you right click on the contextRect Rectangle. public class EditorUtilityDisplayPopupMenu : MonoBehaviour { void OnGUI() { Event evt = Event.current; Rect contextRect = new Rect(10, 10, 100, 100); if (evt.type == EventType.ContextClick) { Vector2 mousePos = evt.mousePosition; if (contextRect.Contains(mousePos)) { EditorUtility.DisplayPopupMenu(new Rect(mousePos.x, mousePos.y, 0, 0), "Assets/", null); evt.Use(); } } } }