how to activate the STK options (as a viewer mode)

Hi guys :-)
Someone knows how to activate the viewer mode and other options like in these videos:
https://www.youtube.com/watch?v=fJZW_KeEI6k&t=15s
Someone knows how to activate the viewer mode and other options like in these videos:
https://www.youtube.com/watch?v=fJZW_KeEI6k&t=15s