Make View Code Feature For Demo App

I don't understand how can I use this special controls on my project so I need help. Can you update demo application like Material Design Demo please. I want to see XAML codes for every controls in mahapps demo.

Start by reviewing the MahApps demo application and the linked screenshot, then compare the requested behavior with the Material Design demo. Done means the demo exposes XAML code for every control and makes the existing special controls understandable to users.

Written by the indexing model from the issue text.