diff --git a/README.md b/README.md
index de70867..8270450 100644
--- a/README.md
+++ b/README.md
@@ -201,6 +201,13 @@ set laststatus=2
 to your `.vimrc`.
 
 
+Almost all of things go well with the patched font but if the triangle looks weird
+![lightline.vim - tutorial](https://raw.github.com/wiki/itchyny/lightline.vim/image/tutorial/22.png)
+if you are using iTerm2, change the following settings of iTerm2:
++ set `Profiles>Colors>Minimum contrast` to Lowest.
++ set `Profiles>Window>Transparency` to Opaquest.
+
+
 
 Now, let us get back to the tutorial (with the patched font for vim-powerline).
 You look into a help file to find the marks annoying.