There are many options in this Preserve Settings, ranging from ProRAW to Live Photos. It's really not clear why Apple needs this, why so many Camera settings won't stick by themselves. Apple encourages you to preserve your ProRAW settings, and there must be a reason. How to actually take a shot in ProRAW This is all about turning the feature on. You haven't got to taking the shot yet. When ProRAW is enabled like this, the Camera app will now include a button for RAW photographs. By default, it will be set to off. You'll see the word RAW with a line through it. When you know you want to take a shot in ProRAW, tap on the RAW button.