New to MP and I want to know how to put an image

Hi,

So I am just learning about MP and I want to know how to make the product image appear on on the main page.

this is the site I have just started working on
http://printourwedding.everydayprintables.com/

White we are at it, I know I saw somewhere the option so see the other stores up in the banner area, but now I can't seem to find it.