Cascading Style Sheets (CSS) is a style sheet language used to describe the presentation semantics (the look and formatting) of a document written in a markup language. It’s most common application is to style web pages written in HTML and XHTML, but the language can also be applied to any kind of XML document, including plain XML, SVG and XUL.  From Wikipedia, the free encyclopedia

v  Edit CSS: Use this set or edit Cascading Style Sheets properties.