diff --git a/admin/code/LeftAndMain.php b/admin/code/LeftAndMain.php
index b1c47f26f..3cca23b1b 100644
--- a/admin/code/LeftAndMain.php
+++ b/admin/code/LeftAndMain.php
@@ -120,12 +120,27 @@ class LeftAndMain extends Controller implements PermissionProvider {
 	 * Used mainly to work around the missing "lazy loading" functionality
 	 * for getting css/javascript required after an ajax-call (e.g. loading the editform).
 	 *
+	 * YAML configuration example:
+	 * <code>
+	 * LeftAndMain:
+	 *   extra_requirements_javascript:
+	 *     mysite/javascript/myscript.js:
+	 * </code>
+	 *
 	 * @config
 	 * @var array
 	 */
 	private static $extra_requirements_javascript = array();
 
 	/**
+	 * YAML configuration example:
+	 * <code>
+	 * LeftAndMain:
+	 *   extra_requirements_css:
+	 *     mysite/css/mystyle.css:
+	 *       media: screen
+	 * </code>
+	 * 
 	 * @config
 	 * @var array See {@link extra_requirements_javascript}
 	 */
diff --git a/docs/en/howto/extend-cms-interface.md b/docs/en/howto/extend-cms-interface.md
index 58a0ef4bd..f931e8f4a 100644
--- a/docs/en/howto/extend-cms-interface.md
+++ b/docs/en/howto/extend-cms-interface.md
@@ -62,7 +62,12 @@ Paste the following content into a new file called `mysite/css/BookmarkedPages.c
 	.cms-bottom-bar a {color: #444444;}
 
 Load the new CSS file into the CMS, by setting the `LeftAndMain.extra_requirements_css`
-[configuration value](/topics/configuration) to 'mysite/css/BookmarkedPages.css'.
+[configuration value](/topics/configuration).
+
+	:::yml
+	LeftAndMain:
+	  extra_requirements_css:
+	    mysite/css/BookmarkedPages.css:
 
 ## Create a "bookmark" flag on pages ##
 
diff --git a/docs/en/reference/preview.md b/docs/en/reference/preview.md
index eed5ae0f3..fde31481d 100644
--- a/docs/en/reference/preview.md
+++ b/docs/en/reference/preview.md
@@ -69,7 +69,7 @@ to the `LeftAndMain.extra_requirements_javascript` [configuration value](/topics
 	:::yml
 	LeftAndMain
 	  extra_requirements_javascript:
-	    - 'mysite/javascript/MyLeftAndMain.Preview.js'
+	    mysite/javascript/MyLeftAndMain.Preview.js:
 
 In order to find out which configuration values are available, the source code
 is your best reference at the moment - have a look in `framework/admin/javascript/LeftAndMain.Preview.js`.