[DCP-o-matic] DCPs with subtitles

Hi Carl.I have some doubts / problems of the DCPs with subtitles ....1. I export subtitles with FAB and SUBTITLE EDIT, and something I do not do well because I have several problems with size, position, ... There is some guide to learn how to export correctly and avoid these problems.2. If we put subtitles in a DCP can 2 "playlist" be made, 1 to watch the video with subtitles and 2 to see the same movie without subtitles? How should I do it? Thank you very much and greetings Jordi Miró