diff --git a/README.md b/README.md
index f9e157e..a836eb9 100644
--- a/README.md
+++ b/README.md
@@ -1,15 +1,15 @@
 # AsmdefGraph
 unity assembly definition viewer
 
-# How to use
+## How to use
 
 [Window] > [Open Asemdef Graph Window]
 
-<img src="https://github.com/naninunenoy/AsmdefGraph/blob/doc/doc/howto_open.png?raw=true" width="200" />
+<img src="https://github.com/naninunenoy/AsmdefGraph/blob/doc/doc/howto_open.png?raw=true" width="450" />
 
 Show assembly definition referances in your project like this.
 
-<img src="https://github.com/naninunenoy/AsmdefGraph/blob/doc/doc/asmdefGraph.png?raw=true" width="200" />
+<img src="https://github.com/naninunenoy/AsmdefGraph/blob/doc/doc/asmdefGraph.png?raw=true" width="600" />
 
 
 You need to organize the nodes by yourself.