Better way to display full images

I have been trying to make an invoice approval system for the past little while in appsheet. I have tried every possible way that I can find to display an image of the first page in a file in its full size. Assigning the image to the background of a details view has led to the most success but the sizing is not dynamic enough account for the wide range of display sizes and even zoom levels on chrome affect how much of the image the user can see. I primarily use appsheet for making applications to be used on a browser and am finding a lot of trouble with sizing and design in general.I know this isn’t the primary function of appsheet but we also love the mobile app that comes along side our primary browser version.