I've had an idea. Sometimes when I'm flying I want to note particular moments - flipped into ATTI, reached 400 feet, a particular manoeuvre I want to watch on the video, for example. So I would like one of the rear buttons to be programmable to place a small red dot on the video at the moment I press it, just for a few frames or so, then later in post-processing I can find those moments and say, Ah! 400 feet! What do you think?