I got a UMIDIGI A9 pro phone. I want to find out how to use all the features of the camera. I downloaded the user manual from the support web site. All it says under camera is basically aim and capture. I don't know where else to look. If some one out there has the same or similar phone, please point me to the right direction. If the camera apps used by the phone is part of the Android system, is there any good documentation on how the app uses the different features provided by the hardware ?