Samsung Galaxy S6 Edge: How to Use Pin Windows Feature in Android 5.1.1 Lollipop

Samsung Galaxy S6 Edge comes with some security features that can be used to secure your phone based on your need and condition, one of which is the pin windows feature. When this feature is enabled, you can pin an app so that your phone can only be used to navigate this app. It can be useful when you want to prevent other people who borrow your phone for certain purpose, e.g: seeing your photo