how to get rid of white space below nav bar

I have both GeneratePress Premium and Elementor Pro. I seem to remember that I bought one of them so that I could get rid of the title and tagline at the top of my home page (and all other pages). I had this working once, but now I have a thin white space under my standard nav bar and above my first section. How can I get rid of this? Also, can you hazard a guess as to how I got rid of the title?

Thanks, I'm new to this.