I use option 6 for the custom story, then just feed it the initial prompt. You can keep clicking the submit button with no text to have it continue generating output. Make sure you're on the Dragon model in the settings and hit save. And you can adjust the returned text length and "temperature" there too. From what I understand temperature is the probability that it will select something other than the most statistically probable next word, which is a proxy for perceived creativity.

Edit: I've hit the reply depth limit, but just to respond you you below. It is absolutely legit, though better than the average output I see and I think I got a bit lucky. If there was anything that would convince you, I'd happily post it. Feel free to look through my HN post history. I'm no troll. My only horse in the race that you believe me is that I think you should keep playing with it and see what it's capable of instead of writing it off. This seems like transformative tech to me and I'm both excited and a bit scared. Have fun!