How Do I Get Rid of the Photo on the Left Side of Front Page?

On my "front page", just below the header, I'm trying to eliminate the photo somehow generate to the left of the content which consists of three columns with photos. I want it to go full width with no photo generated to the left of the content. I was able to accomplish this myself but it somehow immediately reverted and placed a photo back on the left. My website is www.randallhartmanphotography.com Thanks, Randall