From a22e80460eae9034c2108e062f98e33e8c20d649 Mon Sep 17 00:00:00 2001
From: Alberto Acevedo <vascoace@aol.com>
Date: Tue, 17 Jan 2017 15:48:51 -0500
Subject: [PATCH] Update README.md

---
 README.md | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/README.md b/README.md
index e646ee8e..690f6491 100644
--- a/README.md
+++ b/README.md
@@ -179,6 +179,11 @@ cesiumViewer.extend(Cesium.viewerCesiumNavigationMixin, options);
 ```JavaScript
   viewer.cesiumNavigation.destroy();
 ```
+- To lock the compass and navigation controls use the following. Use true to lock mode, 
+- false for unlocked mode. The default is false.
+```JavaScript
+  viewer.cesiumNavigation.setNavigationLocked(true/false);
+```
 
 - if there are still open questions please checkout the examples