Inserting “Home Hero” or “Featured Image” on homepage

I am in the process of building a website through WordPress. I chose the AZA Lite theme because I loved the design of it and thought it was suited well for the type of site I am trying to build. Before I installed it, the Live Preview of the theme showed a “home hero”, or a featured image as the main focus point of the home page. Once I installed the theme, activated it, and began to edit it, the “Home” page no longer had the home hero feature, but a more simplified layout for the home page. I’m imagining it’s a simple fix of adding/editing some custom CSS code, I’m just not sure where to look for that code or where I should be putting it into. I am also interested in learning about the parallax feature that I can see in the theme editor. Can you please help me through this? I’ve tried googling it and looking through forums, but because this is a little more specific within the theme, I’m having a little tougher time finding a solution. I would really appreciate your help. Thank you.