Home page slider

Great theme, but just need a nudge to get the front page hero image working as I want (and as per the demo page) On the demo theme, the Hero image 1920 x 1080 opens at full width and depth - https://catchthemes.com/demo/parallax-frame/. However, when I upload a 1920 x 1080 size image it opens not as full-page helo but rather as a banner. http://o0p3y.hosts.cx/ Help!! What am I doing wrong?