How do i properly customize the pop up pro plugin for viewing on a mobile device?

To Whom it May Concern,

Greetings. I wanted to get some input about customizing my pop up for view on a mobile device. Specifically, my issue is this: when one views my website from a desktop or laptop computer, the pop up ad appears exactly as I want it to. However, when people visit my website on a mobile device, the pop up, unfortunately, obscures the entire home page (that's the page I have the pop up on). Is there a way to properly customize the pop up ad such that it appears on a mobile device without obscuring the entire homepage?

I thank you in advance for your time and help - you guys are always so amazing and diligent, it truly is impressive.