1.) Turn on projectors & lower screens.
2) Quit ProPresenter if it is open.
3.) Using the video switcher, switch the source by pressing the button labeled ‘MAC’. On the top bar of the computer screen, click the small TV icon. A drop down will appear and click ‘Mirror Displays.’ You should now see what you are doing on the computer, being displayed on the screen. Make sure to uncheck this when you are finished.