From 1bb8bdc6b05f761b5e44c212bae8ba634b4806e1 Mon Sep 17 00:00:00 2001
From: Reza Behzadan <rbehzadan@gmail.com>
Date: Mon, 1 Jun 2020 04:57:05 +0430
Subject: [PATCH] update README

---
 README.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/README.md b/README.md
index dd2d284..370647d 100644
--- a/README.md
+++ b/README.md
@@ -12,3 +12,5 @@
 - u: undo
 - f: save current state to "lastBoard.txt"
 - c: solve the puzzle
+- -: zoom out
+- =: zoom in