It'll soon be a lot easier for you to browse through Google Docs files on Android phones and tablets. With the latest version of Docs on Android, you'll now see a small overlay when scrolling through documents. Tapping on it brings up the basic structure of your file, which you can then use to hop to different sections. It's a fairly minor addition, but it's one that should make it much easier to edit documents on Android (it certainly would have been nice when reviewing the Pixel C).