You can copy all or some of a Photoshop image and paste the selection into your Dreamweaver page as a web-ready image. You can copy a single layer or a set of layers for a selected area of the image or you can copy a slice of the image.
Dreamweaver defines the image according to your optimization settings and places a web-ready version of your image in your page. Information about the image, such as the location of the original PSD source file, is saved in a Design Note, regardless of whether you have enabled Design Notes for your site. The Design Note allows you to return to edit the original Photoshop file from Dreamweaver.
For a tutorial on copying and pasting between different applications, including Dreamweaver and Photoshop, see www.adobe.com/go/vid0193.