Format comments

Sorry to be so slow (I've perused other threads that relate to my problem but can't figure out how they apply--hence this new thread) but I'm looking for a simple way to control the amount of space between commenter's names/avatars and the first line of their comment as well as the spacing between paragraphs. I'm using 3.3.2. Any help you could give would be most appreciated. Your theme absolutely rocks by the way!