This type of STL file is relatively simple to use but allows subtitle settings and styles to be changed subtitle by subtitle rather than having an overall style. There is an option to add information as comments to text that is not displayed on screen. Used with DVD Studio Pro. 00:01:58:05, 00:01:59:18. Final Draft is the industry standard, but Scrivener, which I use to write books, also has useful screenwriting tools. And others, like Celtx, are recommended for free if you're just starting out and just want to,