Force mobile display on the desktop

I need to show my customers the mobile application. Not only the menu, but also the grid applications, forms, etc … and show the new effects introduced …
How can I force mobile view?

If you are using Chrome, you could add an extension that will allow the view to be done for Mobile. There are several that can be used, but I prefer using Smartphone simulator on computer - test your mobile site

yes that is not the problem … it is to give an integrated solution to my customers since I believe that for scriptcase programmers it would be enough to add a macro that enables the mobile … then I put everything in an iframe the size of a mobile device .