Giant empty section that I can't delete

@argonautphoto can you share a link to your site? Judging by the section settings it's showing (Manage Projects) it looks like this is a portfolio page collection rather than a regular page. If you add portfolio items (similar to how you add blog posts to a blog collection) they would likely show where that blank space is.

Assuming that's correct, you won't be able to delete it as it's the core feature of the page. You would need to create a new page and add your content there instead. You should be able to hover over the sections that you want to keep on these pages those and click the heart icon to save the section - that way you can quickly reuse them on a new page without having to rebuild