Lower the temperature of the pan to minimum for low pressure, mid-low for high pressure. Because it's still on the heat it should hold the pressure. realistically the steam should only be releasing if there's too much pressure. You can wander away from the pressure cooker but it's advisable to stay in the vicinity of the kitchen when using one so just keep an eye on it and adjust if necessary. But you shouldn't have to on any pressure cooker. I've just purchased a Kuhn Rikon. My old prestige is 35 ish years old and it's noisy. I purchased another prestige one at easter but it leaks steam from the handle and doesn't come to pressure so I'm taking it back today (poor cheap design now so wouldn't recommend going off old reputation from that brand). I ordered my Kuhn Rikon's last night. Lets hope this one works). I'm going to have to get used to no noise on this one. The noise is how I knew my old one had come to pressure.