In Dreamweaver 3, you can now create any kind of floating palette or inspector without the size and layout limitations of property inspectors.
A custom property inspector should still be your first choice for setting the properties of the current selection. However, custom floating palettes offer more room and flexibility for displaying information about the entire document or multiple selections.
Dreamweaver already has several built-in floating palettes that are accessible from the Window menu; you can add your own palettes to this menu using the extensible menus feature. For more information on adding items to the menu system, see Chapter 16, "Customizing Dreamweaver," in Using Dreamweaver.
Floating palette files are HTML files that reside in the Configuration/Floaters folder inside the Dreamweaver application folder. The BODY of a floating palette file contains an HTML form; event handlers attached to form elements may call JavaScript code that performs arbitrary edits to the current document.