Instructions
Press the "Square" button to open the Popit Menu while editing a level.
Highlight "Tools Bag" and press the "X" button.
Press "R1" to switch to the Gadgets menu.
Scroll down to the Advanced Logic section of the Gadgets menu. Highlight "Controlinator" and press the "X" button.
Position the Controlinator in your level with the left analog stick. Press the "X" button to attach the Controlinator to the object you want to control. When playing the level, press the "Triangle" button to activate the Controlinator and enter the Controller Chair.