Unity - Press F5 to reload the current Scene. Used a lot in development. Probably remove before making a public build.

F5ReloadScene.cs

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

public class F5ReloadScene : MonoBehaviour {

	public KeyCode keyCode = KeyCode.F5;
	
	// Update is called once per frame
	void Update () {
		if(Input.GetKeyDown(keyCode))
        {
            UnityEngine.SceneManagement.SceneManager.LoadScene(UnityEngine.SceneManagement.SceneManager.GetActiveScene().buildIndex);
        }
	}
}