How can I reset an iPhone 14 Pro Max without a factory reset?

My fone was playing up one day and he took it off me. I think he said press up then down then in middle until it shows slide to turn off but don’t just leave it, it will turn off and turn back on again. I’ll ask him the order soon

[Re-Titled by Moderator]

Original Title: Resetting an I phone without a factory reset or going into settings?