A tour of Android 6.0 Marshmallow running on the Google and HTC Nexus 9. Android 6.0 features many new behind-the-scenes features and improvements to the radically new Android 5.0 OS which came before it. Some of the new features include a redesigned app drawer, new volume toggles, a memory control section, improved battery optimization settings, and app permissions among many others. Which new features do you like the best?