Satellite image receiver.

Hi guys! Great app! Love it. I’ve got some great photos, but have a few suggestions… Forst of all, where can I select dark flat and light frames??? Could you implement that as a SEPRATE setting? It’s convenient as is, but would also love full manual as an option. Also, could you select where in the exposure are that you want to stack based off? Otherwise a great app! Would encourage! Now it’s no Nicon and telescope, but it gets the job done. Would benefit from a good tutorial… just saying. Can’t