I want to present a screen at the end of the mission briefing that lets the player choose one of several starting points.   I don't know of any missions that do this.   Before I begin investigating how to make that happen, I wonder if anyone already has this working. I'm particularly interested in how to pass the result of a custom button press to the mission script. I couldn't find any clues in the Wiki.   (I'm not interested in changing the starting point using the Difficulty settings.)   Than