How to show and hide?

I saw this portfolio website
I really liked the idea of the button in the upper right corner, “try me”.
I wonder how can I make this in webflow. I mean how to show like a whol new page when the visitor click on the button?

Although it can be very tricky when actually doing it, the concept is not difficult. On Webflow, we can make put overlays and toggle to hide and show.