Picture-in-Picture Tool
The Picture-in-Picture tool is dragged onto the preview window and added to the currently selected slide. The tool will display a green square on the preview screen. You can resize this square to set the display window for the live camera. When the slide is played or clicked on a live image from the default camera will be shown in the green square.
Live Camera Tool
The Live Camera tool is dragged onto a sequence/playlist and when played or clicked on will show the live camera as the background of all subsequent slides that do not set the background.