About the Presentation Pane
In the presentation pane you edit the way you want the elements in your form to appear when it's displayed on your web page. You do this by modifying the cascading style sheet (css) rules that are applied to each element.
While you don't have to be a css expert in order to effectively use this pane, you should have some familiarity with cascading style sheets and understand how the rules cascade from parent to child elements.