There is no problem browsing my application when pressing back exits the application

Hello friends, I want help. I created a one-page project to browse my website on the application, but there is a problem that when browsing the application, when I press the back button, I exit the application. How to solve this problem, thank you.

Drag a Screen.BackPressed event into the working space

Taufun

I did not find this option, where can I find it? Please help me. I used one screen at work and added my website, but when browsing the application and entering windows within the application, when I return, it does not go back again, but rather exits the application.

In the Screen drawer

Taifun