#if UNITY_EDITOR
using UnityEngine;
using UnityEditor;

public class TransformMacros : Editor {
        [MenuItem("Macros/Snap Selection To Ground &#v")]
        public static void SnapToGround() {
                foreach (Transform t in Selection.transforms) {
                        RaycastHit rayhit;
                        if (Physics.Raycast(t.position, Vector3.down, out rayhit)) {
                                t.position = rayhit.point;
                        }
                }
        }

}

#endif