The 0 minutes at pressure setting is a way to avoid overcooking delicate ingredients such as vegetables or fish. Every Instant Pot model allows you to choose "0 minutes" as an option, which brings the pot up to maximum or high pressure and immediately stops cooking. For some dishes, like pasta, a slightly different technique can be used. Set the time for 1 minute, then release the pressure not when the machine reaches high pressure but the moment the lid's float valve jumps up and clicks closed. You'll know the float valve has closed because no more steam can escape. In this case, use the quick-release method to get rid of the pot's pressure right when the float valve closes to prevent delicate ingredients from sticking, burning, or becoming gummy.