PO/Assets/Scripts/CanvasChanger.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class CanvasChanger : MonoBehaviour
{
    public GameObject canvasToOn;
    public GameObject canvasToOff;

    public void ChangeCanvas()
    {
        if (canvasToOn != null)
            canvasToOn.SetActive(true);
        if (canvasToOn != null) 
            canvasToOff.SetActive(false);
    }
}