No, there is no control panel you can do that in, at least, not yet. There may be, but Moodle 2 Themes are newish and people are still exploring the possibilities. No doubt as it become more sophisticated there will be something that it can be donbe in, but the links I gave you will introduce you to how themes are created and how they can be manipulated. You need to know a little HTML, a lot of CSS and PHP. Themes are constructed by CSS, so I am given to understand. You might want to go into the Developer's Forum or the Themes forum for more assistance.
Text editors
HTML/PHP
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