Touchscreen interference when using the phone underwater

[AC Question]

Hi folks,

Really new to the phone and I was wondering if there is a setting to prevent random screen activity when taking photos underwater.

I currently use a lifeproof case on the S7 and when taking photos or video underwater I notice lots of zooming in/out, refocusing etc.

Is there a setting (or third party app) which will completely ignore screen input and perhaps use the phones buttons to control the camera?

Sorry if this there is already a thread explaining this.

Thanks!