Responsive/Mobile settings?

I just downloaded this plugin after becoming frustrated with another one that did not offer any responsive features. The description of this one says that there is support for mobile devices. How/Where do I find this? I would like to be able to control the side of the viewer depending on the screen size. Some of my pdfs are only 1 page, so I can set the height to display nicely on desktop, but then on mobile there is a large gray area below the document. Thanks for any help you can provide.