Open the Settings app
Scroll down and tap Camera
Adjust camera options as needed
Tap Formats to change photo format settings
Tap Record Video to change video resolution and frame rate
Tap Record Slo-mo to change slow-motion settings
Turn on or off Smart HDR if available
Turn on or off Grid if desired
Turn on or off Mirror Front Camera if desired
Turn on or off Scan QR Codes if desired
Turn on or off Preserve Settings if desired
Open the Camera app to use the updated settings