Thank you for such quick response. I know to use the css sprites, but I am having difficulty finding where to put the code for the theme. I feel like I’ve tried putting the code (background-position: 480px 0px no-repeat;) in every part of the css for autofocus.
editing in the sidebar did not work for me, but editing in the functions.php page at line 462 (the sandbox_globalnav function) worked.