on FP4 at least I used to have the single tap, single touch, tap anywhere, touch anywhere on the camera preview, to focus and then automatically take and save the photograph.
this doesnt seem to be working on FP5 any more. I tap the screen, but i need to tap that big circle in the bottom middle to take the photograph.
i have looked around on the web and found mentionings about single tap and tap anywhere on other vendors and their phone apps as well.
the settings on FP5 doesnt help to find such a setting.