The Google Apps Launcher
Having trouble finding the tools in Google Apps? The navigation is deceptively simple. When you are logged into the main screen of any Google tool, you will see the launcher (picture below). When you click on it, it expands into an iconic menu of tools.
You can customize the Google Apps launcher -- add links or drag and drop your favorites to the top. You can even delete apps you don’t use to keep your launcher uncluttered.
Step by step instructions at: https://support.google.com/chromebook/answer/2587945?hl=en