Hide app name in summary view

I put the iframe of a list view in a webpage and when the user clicks on an item, it takes them to the summary view of a specific item. There's a link at the top to my app that says "app name by username". How do I hide this? The link is clickable so the page is loaded within the iframe. Is there a way to edit this? Ideally, I'd like to be able to customize the heading so that the information is specific to my item (maybe a link to a wikipedia page, or something). Other options would be to just hide the link or make it open in a new page, instead.

Thanks.