When you create a new document or open an existing Fireworks PNG file, the document's filename has the extension .png. Files of other types, such as PSD and HTML, also open as PNG files, allowing you to use the Fireworks PNG document as your source file, or working file.

However, many files retain their original filename extensions and optimization settings when opened in Fireworks. For more information, see Saving documents in other formats.

The location to which Fireworks defaults when you save a document is determined by the following, in this order: