Let us see the solution to this challenge. None of my style shows up in the XAML design view (in the video it does). Successfully merging a pull request may close this issue. What is this political cartoon by Bob Moran titled "Amnesty" about? The default values are mathematically NaN (Not A Number). WPF: How to have custom button template that uses system's button background by default? To learn more, see our tips on writing great answers. So Near the end of the Button element . Panel.ZIndex="100" Sign in