When you no longer want the debug information generated you can disable generation in the CSS Preprocessors tab in the Options window. Perform the following steps to run the application in the Chrome browser. For example, let’s say an email is being sent from a store configured with the Magento Luma theme. Defining a Style as a XAML resource A Style is almost always defined in XAML as a resource in a ResourceDictionary. Click OK.When you click OK the IDE creates a CSS rule for img in the css/mycss.css style sheet between the brackets of the media rule.