[TYPO3-english] Preview Heading Style in HTMLarea Dropdown

[Scotty C]

Hi everyone,

My current client wants to put different sizes and colours of text EVERYwhere in their site. I've advised them to use CSS, which they're willing to do, but HTMLarea doesn't show a preview of each heading style and the client can't remember what each style looks like. So, they've decided to use font-size/color instead. .... and I can't blame them! 

Could somebody please tell me how I can stylize the items in the "block format" dropdown of HTMLarea so users can get a preview of each headings style?

Thanks for the help!
-Scott.