updated view renderers docs

docs/view_renderers.md

@@ -2,17 +2,20 @@ Yii2 view renderers
 ===================
 
 By default Yii uses PHP as template language but you can change it in your application.
-The component responsible for rendering a view using custom template enging is
-called `viewRenderer`. You can configure it as follows:
+The component responsible for rendering a view is called `view`. You can configure
+a custom template engine as follows:
 
 ```php
 array(
 	'components' => array(
-		'viewRenderer' => array(
+		'view' => array(
+			'class' => 'yii\base\View',
+			'renderer' => array(
 				'class' => 'yii\renderers\TwigViewRenderer',
 				// or 'class' => 'yii\renderers\SmartyViewRenderer',
 			),
 		),
+	),
 )
 ```
 
@@ -29,3 +32,29 @@ Smarty
 In order to use Smarty you need to put you templates in files with extension `.tpl`.
 Also you need to specify this extension explicitly when calling `$this->render()`
 or `$this->renderPartial()` from your controller.
+
+Using multiple view renderers in a single application
+-----------------------------------------------------
+
+If you need multiple view renderers at the same time in a single application you
+can use `CompositeViewRenderer` as follows:
+
+```php
+'components' => array(
+	'view' => array(
+		'class' => 'yii\base\View',
+		'renderer' => array(
+			'class' => 'yii\renderers\CompositeViewRenderer',
+			'renderers' => array(
+				'tpl' => array(
+					'class' => 'yii\renderers\SmartyViewRenderer',
+				),
+				'twig' => array(
+					'class' => 'yii\renderers\TwigViewRenderer',
+				),
+			),
+			//'class' => 'yii\renderers\TwigViewRenderer',
+		),
+	),
+),
+```