I would like to remove some of the white space which sits below the header image in the theme TwentyEleven, and have seen suggestions where you make changes to the the style.css sheet (http://wordpress.org/support/topic/removing-white-space-below-header-image-in-twenty-eleven?replies=6#post-3274261).
Now I have the same issue, but I'm confused. I made my own style.css child theme at the beginning, so that sheet only has a minimal amount of code in it. It doesn't have everything that the parent css style sheet does and doesn't have that snippet that was mentioned. In this case, what do I do to get rid of the white space?