Final Draft's file format - the industry's de-facto standard for exchanging screenplay files.
FDX is the file format of Final Draft, the long-standing industry-standard screenwriting application. When a production, agency, or contest asks for 'the Final Draft file', they mean an .fdx - element types and formatting travel with the document.
Most modern tools read and write it, which keeps your script portable between collaborators regardless of what anyone drafts in.
In One More Draft:Final Draft import & export
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