Thank you for choosing Flux. Flux is a XHTML/HTML and CSS design tool for Mac OS X. Flux makes designing web pages easy with a WYSIWYG, drag and drop interface, and uses simple palettes to change CSS values, to simply style up your XHTML pages.
XHTML is the W3C specification for designing web pages, it's a fully documented, validated way of creating web pages which is supported by all modern web browsers.
CSS (Cascading Style Sheets) is a specification for adding style to XHTML (and other) documents, so all page content can be held in XHTML, and all styling information can be held in the CSS file, making for a simple and more clean site structure.
Flux brings XHTML, CSS and an easy Mac interface together to let novices and professionals create amazing websites.
If you are already a Flux user, upgrading to Version 4, then the following sections will be of most interest, as they describe the most significant new features.