Whenever you export a Fireworks file from a saved source PNG file to a Dreamweaver site, Fireworks writes a Design Note that contains information about the file. For example, when you export a Fireworks table, Fireworks writes a Design Note for each exported image. These Design Notes contain references to the source PNG file that spawned the exported files.

When you open and edit a Fireworks image from within Dreamweaver, Dreamweaver uses the Design Note to locate a source PNG for that file. For best results, always save your Fireworks source PNG file and exported files in a Dreamweaver site. This ensures that any user sharing the site can locate the source PNG when starting Fireworks from within Dreamweaver.