Android’s Quick Settings tray isn’t new in Marshmallow, but tucked away in the bowels of Google’s new mobile OS is a hidden feature that lets you customize what appears there. It’s a useful tool if you don’t want certain items you’ll never use taking up space in the Quick Settings tray, or if you want to rearrange the icons so that the shortcuts you use most often are in an easy-to-reach place. It takes a little trickery to get to this feature, but it’s still easy enough to get to.
First, you need to enable Android Marshmallow’s System UI Tuner. To do so, first swipe down from the top of the screen to open the notification drawer, then swipe down again to open the Quick Settings tray (or, swipe down with two fingers). Next, press and hold the gear icon in the upper right corner for a few seconds until the gear icon starts spinning. Release your finger, and you’ll be presented with a message telling you that System UI Tuner is up and running.
Open the Settings app if it isn’t already, scroll down, then tap System UI Tuner under the System subheading. If this is your first time using System UI Tuner, you’ll get a message warning you that System UI Tuner features are “experimental” and “may change, break, or disappear in future releases.” Read and dismiss the message, then tap Quick Settings.
At this point, you can rearrange, remove, or add items to the Quick Settings tray quickly and easily. To rearrange items, simply drag them around. If you want to remove an icon, drag it from its location in the Quick Settings tray to the Delete icon. If you want to add (or re-add) an item, tap Add tile, then tap the name of the setting you want quick access to.
The Quick Settings customization tool works reasonably well, but it’s still a little rough around the edges. That said, it works well enough that I could totally see Google building it out a little more and making it easier to access.