I attached some marked up screen shots of the camera setting in iPhone iOS that I just took for this post The most tricky one is setting the Live Photo setting to GREEN or ON which means the opposite of what you are trying to achieve This means “yes I want camera to remember to keep it OFF” In the screen shot of the camera app The Red A arrow points to the Live Photo OFF setting If you do not turn ON the setting persistence in settings this tiny OFF switch in the photos app will reset to ON when you relaunch the app
The green arrows on the photos app screen shot call out where the buttons on the sides of the phone are located To take a screen shot press the side button and volume up together This action will work on iPads and iPods too Screen shot always works in any app at any instance It’s an operating level behavior
Hopefully this information helps a bit and isn’t too confusing -s
