Update README.md

Author: reedy

README.md

@@ -3,6 +3,8 @@ MediaWiki support for PhpStorm
 
 [MediaWiki](https://www.mediawiki.org/wiki/MediaWiki) IntelliJ plugin for [JetBrains PhpStorm](https://www.jetbrains.com/phpstorm/), mostly providing standardised code styles for PHP, JavaScript, CSS and HTML. It also provides a shortcut to the [MediaWiki](https://www.mediawiki.org/wiki/MediaWiki) search from the context menu.
 
+To configure/use the MediaWiki Code Styles, go to Preferences > Editor > Code Style > PHP/CSS/Html/JavaScript, and then select "Set from..." and select "MediaWiki".
+
 Note, this doesn't provide MediaWiki file or Wikitext syntax highlighting support.
 
 [JetBrains Plugin Repository :: MediaWiki Support](http://plugins.jetbrains.com/plugin/7439)