The manual for the Mavic Pro, and a video I have seen online, show a button on the app screen near the top right which can be used to switch (toggle) between setting the camera's focus point, or setting the exposure point. But it is nowhere to be seen on my screen, and I cannot find any else that will allow me to set where or how the camera measures exposure. Have I somehow made this switch go away? I am using an ipad mini to run the latest version of the app. I installed the latest firmware yesterday, and it is possible that the missing switch was there before the firmware update (only had the Mavic a few days).