There is only one file type that uses the .TRELBY extension:
Screenplay file created by Trelby, a free screenwriting program; contains a screenplay consisting of locations, scenes, characters, and headers; includes reports based on elements you've inserted into your screenplay, such as characters and scenes.
To create a TRELBY file, select, choose the save location, name your file, and click .
To open a TRELBY file, double-click the file or select, navigate to your file, and click .
To export a TRELBY file to another format, such as a .PDF, .RTF, .HTML, or .FOUNTAIN file, select, choose the save location, name your file, select the file tyro from the "Save as type" drop down menu, and click .
Updated: July 29, 2014