Adobe Dreamweaver CS5 * CSS Styles panel

In Current mode, the CSS Styles panel displays three panes: a Summary for Selection pane that displays the CSS properties for the current selection in the document, a Rules pane that displays the location of selected properties (or a cascade of rules for the selected tag, depending on your selection), and a Properties pane that lets you edit CSS properties for the rule applied to the selection.

via Adobe Dreamweaver CS5 * CSS Styles panel.