I have seen a few threads in the original OpenSong forum requesting a method to save commonly used personal slides (i.e. prayers, creeds, announcements that run several weeks). Almost everyone I have introduced to OpenSong have asked if it can save their custom slides. Saving them as songs clutters up the songs data. Announcement slides information has to be copied from week to week for long-term events.
Please consider adding "Custom Slides" as a Set Mode function. How's about a menu choice when one presses the Slides button giving one the choice between a new slide or a saved slide. At the same time, there would need to be a way to save Custom slides and be another folder in OpenSong data (Alongside Songs, Backgrounds, Sets and Settings) for Custom Slides.