Finally: Hidden Android M feature allows customization of quick toggles
Over the years, third-party devs' efforts have translated into functionality that, eventually, becomes available with stock — or Google's — Android. In Android M, we already saw yet another great piece making the transition from a third-party perk to a core feature — granular volume controls bar. After some digging, however, we found that another often-requested feature may very well become a part of the core Android experience: customizable quick toggles.
In case you drew a blank at the mention of quick toggles, they're simply the shortcuts available when within the notifications panel that you slide from the top. There, you have access to brightness control, Bluetooth, Wi-Fi, and so on. Until now, it's never been possible to re-arrange or change these. In Android M, however, this may change, judging by a new feature available within the hidden (by default) Developers options menu. In there, you can find a SystemUI tuner option, which if enabled, spawns a menu of the same name in the root settings menu, as shown below.
For the time being, the option is quite buggy, and constantly causes the system UI to crash. Occasionally, however, it works properly, allowing us to change things around and even add a new, custom toggle. Due to the nature of developer previews, it is possible that this feature never makes it into the final, commercial software, so keep that in mind. If it does, however, Google will give many an additional reason to love stock Android.