This time the Dreamweaver CS4 Beta is officially launched, so let me be a guinea pig.
The new interface design is very exciting:
The css and js files linked in the page can be selected and edited here.
The Code Inspector function allows you to make code modifications in the design view very conveniently.
Various windows can be displayed as icons on the right and can be called up when needed, saving a lot of space.
Various working areas can also be switched easily.
It is now easier to control and remove styles from elements.
Extension Manage CS4 also uses a new interface.
The only thing that makes me depressed is that the associated file icons have changed to the style of Notepad.