added CodeLens support to XMLFeatures.md

Author: Alexander Chen

docs/Features/XMLFeatures.md

@@ -158,6 +158,18 @@ This also works for other portions of an XML document, such as attributes and th
 
 ![Selection Range](../images/Features/SelectionRange.gif)
 
+## CodeLens
+
+CodeLens is supported for `.xml` files for a number of different features.
+
+### CodeLens 'Bind to grammar/schema...'
+
+If the current XML document is not bound using a `xml-model` tag or a root element doesn't have a `xsi:noNameSpaceLocation` attribute, the CodeLens will appear above the snippet, which will trigger the ["Bind to grammar/schema file"]() command.
+
+![CodeLens Bind](../images/Features/CodeLensBind.png)
+
+For more information on CodeLens capabilities, see [CodeLens](../CodeLens.md#code-lens).
+
 ## Custom Feature Implementation
 
 You can implement your own feature with a [Java extension](../Extensions.md).