Select which pin you want to mess with
Pick what pin mode you want to set
This could be PWM, a basic high/low output, a servo output, a buzzer, etc.
PWM allows you to edit PWM frequency, value, and if you want it to pulse - while the basic output only allows you to turn it on and off.
View status of pins in the playground menu
The same place where you pick pins, you can also see the pin statuses - if it's PWM already, if it's on or off, servo angle, and more.