Using the In-App XAML Inspection toolbar we can directly access the Live Visual Tree and Live Property Explorer from the running application. Live Visual Tree shows the hierarchy of all UI elements in the app that we are debugging and the Live Property Explorer shows properties of UI elements at runtime. Combination of these two tool allow you to take a deep into your xaml code and review the necessary change at runtime. This really helps developer to find and fix many UI related changes, also to dealing with different styles. This quick tip talks about how we can turn on/off the In-App XAML Ispection toolbar.
Following two posts talks about some of the details functionalities of this In-App XAML Inspection ToolBar
By default this runtime tool is turned on, and in case you want to turned it off, you can do it from the Live Visual Tree Toolbar.
When this is ON, you should be able to see the inspection tools appears inside the App ( Refer to the following images from a running app)
Turned the button off inside “Live Visual Tree” tools , if you don’t want to see the In – App XAML Inspection toolbar.
Keep in mind, disabling this toolbar from the app won’t disable the functionalities of Live Visual Tree or Live Property Explorer. This will just turned off the In-App toolbar, rest functiality will work as it is, where you need to select option from Live Visual Tree .
Read This Post for more details : Working with Live XAML in Windows Universal Apps and Visual Studio 2015
Hope this helps !