There's a pretty slick little "hidden" feature that is now included in Google's latest Android 6.0/Marshmallow OS. It's called System UI Tuner, and it basically lets users tweak parts of the UI in ways that wasn't possible before without rooting and adding mods. With this System UI Tuner, users can now enable demo mode, re-arrange the tiles in the Quick Settings pane, and show a battery percentage within the battery icon on the status bar. It's not a huge difference, but it's still great to see Android evolving even further. This is just one of the many new features that Google included in Marshmallow. Sound off in this thread and let us know which new features and functions you are most excited about.