How does the sanding pad get changed ? festool 490167 inline sanding pad

The Festool LS 130 Sander has a spring-loaded mechanism for swapping the pads. There are a variety of pad shapes available for this linear sander. You can see it in demonstrated in the video below around the 1:00 mark.https://www.youtube.com/watch?v=_lRbGRk9DkY