Templates contain comments like this: ``` php /** * Product view template * * @see Mage_Catalog_Block_Product_View * @see Mage_Review_Block_Product_View */ ``` Adding @var $this comments enables code completion in our IDEs: ``` php /** * Product view template * * @var $this Mage_Catalog_Block_Product_View * @see Mage_Review_Block_Product_View */ ```