I am using a custom theme but to get an image to span the whole header I was told to us a custom CSS, I have enter numerous variations and cannot get it to be aligned to cover the whole thing, it always drops down and to the right. My dimensions are correct, but I do not know how to get it to align to cover the entire height and width of the header.
Any help would be greatly appreciated. Thank you. Below is a link to the orientation of the image