You'll also be able to shrink sims down to preteen height (even works if they aren't preteens) & reset them to their normal height.
Preteen Base Settings Pie Menu: This is where you'll have the option to add/remove the preteen trait. It also has a 'Current Settings' interaction that lists out the current settings. Config Settings Pie menu: This allows you to change various settings such as the chance of having dry skin, Agespan length, Enabling Aging, Toggling the Startup Notification.