A simple Unity3D Editor script to toggle canvas setactive. Useful when you want to design something in Editor and often messing up by selecting canvas instead of objects.

CanvasToggler

using UnityEngine;
using System.Collections;
using UnityEditor;

public class CanvasToggler : Editor {
	
	public static GameObject[] canvases = GameObject.FindGameObjectsWithTag("Canvas") as GameObject[];

	[MenuItem("Editor Tools/Toggle canvas")]
	static void ActivateOrDeactivate(){
		
		foreach( GameObject i in canvases){
			i.gameObject.SetActive(!i.gameObject.activeSelf);
		}
	}

}