In the new update of Visual Studio, while running a Windows Universal App from the Visual Studio 2015, you can see three options on the center below the title bar of the App. These indicate UI Debugging Tools. Here we will have a look on how to remove the same while running your application.
Step 1: To Disable this, Uncheck the option from Tools à Options à Debugging à General à Enable UI Debugging Tools for XAML
Step 2: Run and Test your application.