How do I set a punch-in point without a punch-out point?

I'm recording an audiobook and I need to set a specific punch-in point where I mess up and then I'd like to continue recording without setting a punch-out point. All I've been able to find so far is punching-in on the fly, but I don't want to do that because I need the punch in point at a specific spot, and I need to be focused on the text and hearing how I was reading it, no focused on pressing record at the right spot. There's got to be a way to turn off the punch-out point using the auto punch... right?