How to turn off System Integrity Protection on macOS ?

In case an app crashes, and you are unable to utilise it, please disable the "System Integrity Protection" as follows: 
1. Turn off your Mac (Apple > Shut Down).
2. Hold down Command-R and press the Power button. Keep holding Command-R until the Apple logo appears. Wait for the OS to boot into the OS Utilities window.
3. Select Utilities > Terminal.
4. Enter csrutil enable 
5. Enter reboot.
Please proceed with the actions you wanted to perform initially.