First, slide your notification tray down (either swipe down twice or swipe down with two fingers) to open the Quick Settings part of the tray. In between the battery percentage and your user icon, you’ll see a little gear icon — press and hold that for several seconds.
After you let go, you’ll be alerted that the System UI Tuner is now available in Settings > System UI Tuner.
Side note: If this doesn’t work, try enabling Developer Options if you haven’t yet. To do so, just go to Settings > About Phone and tap the Build Number entry seven times to enable them. Be careful in this menu if you visit it, as there are settings that could cause your phone to behave strangely.
The UI Tuner menu doesn’t have many options, but what’s there is useful. You can rearrange your Quick Settings to remove tiles you don’t use or put them in a more logical layout. The Status Bar option lets you remove icons from the top-right of your notification area, so you can hide icons that just waste space like Bluetooth or the constant Alarm icon.
The unnecessary NFC icon in the status bar of Samsung devices is so hideous I only enable NFC when shopping. No System UI Tuner either.?
One of the best tweaks you can make here is showing the battery percentage right inside the battery icon. This lets you know exactly where you battery is at all times without having to open another menu; if it’s draining too quickly, check out our battery-saving Marshmallow tips.
Do you use anything in the System UI Tuner? Let us know what you’d like to see added to this menu in the future!