Undo.undoRedoPerformed

public static Undo.UndoRedoCallback undoRedoPerformed ;

Description

Callback that is triggered after an undo or redo was executed.

using UnityEditor;
using UnityEngine;

public class ExampleScript : MonoBehaviour
{
  void Start()
  {
    Undo.undoRedoPerformed += MyUndoCallback;
  }

  void MyUndoCallback() {
     // some code here
 }
}