Changing Jumbotron Background Image Size


I am trying to change the background image of the jumbotron in the final stages of the CSS/HTML module. The problem is, the image I want to use is not cropping well. I have tried setting height and width to 100%, changing the z-index, nothing seems to be working. Any advice?


You might find what you are looking for at the following link, they usually have sensible advice: