Integration between Photoshop CS3 and Dreamweaver CS3 and above permits you to copy a selection or layer from a Photoshop PSD file directly into Dreamweaver, which launches the Image Preview dialog box for you to optimize and save an image ready for the Web.
If you can't copy from a PSD into Dreamweaver, check that the Export Clipboard checkbox is selected in the Photoshop General Preferences panel, as shown here:
Many thanks to Bob Levine for providing this useful tip.
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