Create your own premade "Format"

Hi!

Would first like to start by apologizing for my bad explanation on my “problem” that I have.

I want to add my own premade “Format”. When i create a new post or edit a post. What i mean with “Format” is that, the option that let you change your text to a heading and other formats. When you select text in your posts.

Example of what I want
I want to have a custom Heading in the “Format” list. Like “TcipsHeader”. And when i use this on selected text. It will change the font, color, size on the selected text.

I hope you understand what I mean :-/

Screenshot: http://i60.tinypic.com/nzoy04.jpg