Android implements what OEMs and ROMs have for ages. The Developer Option has an almost nondescript "Show SystemUI Tuner" that, once enabled, adds a SystemUI Tuner setting to the main Settings list.

One of the standout features of the new version of Android O is the ability to customize the nav bar, but the feature exists in all Android Nougat versions.

Remember the System UI Tuner that showed up in the original Android M Preview? You know, the hidden developer option that would allow you to tweak the settings toggles in the notification shade ...

If you noticed the SystemUI Tuner missing from the new preview 3 of Android 6.0 Marshmallow, this is how you turn it back on.

As is typical, Google already stripped out all the other System UI Tuner features introduced in the earlier previews with DP3.

If you're a developer, you may have noticed one bug in the latest Android 7.0 and its various Developer Preview releases: the option to "Show CPU usage" under Developer Options in the settings ...