Header Image vs Frontpage

I don’t really want the slider but I do want the Image on my frontpage to be the full screen. Why can’t I only choose 1 or even 2 images in the slider, instead it slides thru blank screens if you leave the image blank. If I choose Image instead I can only update the Header Height and so the image is not full screen width.

Really I want the frontpage only to have a full screen image, not the header on each page. How do I do that?

Check the speed option for the slider.