Expanding Page Size Height

Is there a way to add additional visuals onto a page while keeping the aspect ratio the same to 16:9? In QlikView, if we want to add additional visuals, you simply drag whatever you want on to the page and it will keep the same aspect ratio but just increase the height of the page by adding a scroll bar (scroll up or down the page). 

My explanation may sound so confusing but I like the current aspect ratio of 16:9 but can't figure out the correct custom dimensions that will keep similar to the default settings but letting the page scroll up and down if there are more items. 

Any advice would be appreciated.