I am using the Sundance theme to create a site and am hoping to edit the coding to create a smaller custom header. The size is currently 984x242. If I create a jpg smaller than this size it is stretched to fill the 984x242 space. If I make the log smaller within a 984x242 document in indesign the header area impedes upon other areas of the site. I am new to wordpress and need specific directions on how to edit the code. I saw similar posts and tried to edit but it did not work.