You can use the Assets panel in Dreamweaver CS6 to manage assets in the current site. The Assets panel displays assets for the site associated with the active document in the Document window. A library item is a special category of assets that can automatically update all instances of a library item whenever you edit the item The Assets panel provides two ways to view assets:
Site list shows all of the assets in your site, including colors and URLs that are used in any document in your site.
Favorites list shows only the assets you’ve explicitly chosen. To switch between these two views, select either the Site or Favorites radio button above the preview area. (These two views are not available for the Templates and Library categories.)
In both lists, assets fall into one of the following categories:
• Images image files in GIF, JPEG, or PNG formats.
• Colors colors used in documents and style sheets, including colors of text, backgrounds, and links.
• URLs external links in your current site documents, including FTP, gopher, HTTP, HTTPS, JavaScript, e-mail (mailto), and local file (file://) links.
• Flash files in any version of Adobe Flash. The Assets panel displays only SWF files (compressed files created with Flash), not FLA (Flash source) files.
• Shockwave files in any version of Adobe Shockwave.
• Movies QuickTime or MPEG files.
• Scripts JavaScript or VBScript files. Scripts in HTML files (rather than in independent JavaScript or VBScript files) do not appear in the Assets panel.
• Templates master page layouts used on multiple pages. Modifying a template automatically modifies all pages attached to it.
• Library items design elements that you use in multiple pages; when you modify a library item, all pages containing that item are updated.
By default, assets in a category are listed alphabetically by name, but you can sort them by type and several other criteria. You can also preview assets and resize the columns and the preview area.