How do you rename a peep on Roller Coaster Tycoon 3?

To rename a peep in Roller Coaster Tycoon 3, simply click on the peep you want to rename. Then, open the information panel that appears and look for the name field at the top. Click on it, type in the new name, and press Enter to confirm the change. This allows you to personalize your peeps and keep track of them in your park.