TouchWiz was often blamed for being too full of bloatware and slowing down the device that it was supposed to improve in terms of user experience. Samsung listened to that criticism and finally decided to trim the UI down in size. While this step worked really well and most users liked the new TouchWiz a lot better, it did come with certain sacrifices in terms of customizability. Earlier, it was possible to tinker with the backlight settings of the capacitive keys, but unfortunately, it is a thing of the past now.

Fortunately, you can still customize it on your S6, S6 Edge, S6 Edge+, Note 5, S7 and S7 Edge with the help of a third party app known as Galaxy Button Lights. Download it for free from the Google Play Store and install it. Once you open the application, you will find that everything that was missing from the TouchWiz settings menu in terms of the capacitive key backlighting, they are all there.

You will get to change and choose in-between settings such as Time to remain on, Always on, Always off and Default. Adjust the settings according to your convenience and tap on SAVE BUTTON BACKLIGHT BEHAVIOR to apply the settings on your device immediately. Just to make sure that you are downloading the right application, check if the developer's name is mentioned as NotQuiteinsane on the Play Store's Download section. If it is, then that's the right app.