I'm using Samsung Galaxy S4 on Android 5.1 Lollipop. I found Google Now in settings and I decided to check what is it. Now settings interface has changed and I don't know how can I replace Google Now back to TouchWiz.
Uh, I'm not entirely sure what the question is so just tell me if I'm wrong. If you pull up Google Now launcher under the apps section of settings there should be a button titled "clear defaults." If you select this it should ask you which launcher you want to use next time you close an app. You can also install a different launcher and the same thing will happen but the other way should be easier.