How do I remove the bar at the bottom of the first slide?

Hello, I have a thin, dark grey bar that runs across the bottom of my first slide (like a windows taskbar). It's only on the first slide, and it is on top of my background image. I assumed it had something to do with a play bar, but I removed the playback controls in the skin editor.

However, this bar is still on the first slide.

I have no idea what it's called nor how to get rid of it.

Thank you in advance.