diff --git a/README.md b/README.md
index 16957e2..8b23396 100644
--- a/README.md
+++ b/README.md
@@ -25,6 +25,10 @@ and for the text itself:
 
     notehub.org/.../title?header-font=FONT-NAME&text-font=FONT-NAME2
 
+Analogously, you can specify you can change the font size by specifying a scale factor:
+
+    notehub.org/.../title?header-font=FONT-NAME&text-font=FONT-NAME2&font-size=1.5
+
 See an example of the font formatting [here](http://notehub.org/2012/6/16/how-notehub-is-built?header-font=Berkshire+Swash&text-font=Swanky+and+Moo+Moo).
 
 After you've specified this in the url, you can copy the corresponding short url of the article and share it.