Mobile App Open URL in frame on new screen

I am new to Outsystems and have a question about opening a URL.  I have my Mobile App opening a URL  by using the onclick event for a button.  It opens the file that is on a web server.  But when it opens, I have no way to go back to the screen with the button.  

Is there a way to open the URL in a frame on a new screen so that I can use a back button in the header to go back to the home screen?