Display video from a browser (PB-Elementary)

1.) Power on the AV rack by using the button on the top right. Be sure to turn this switch off when finished. Here are three examples of the type of button you may see:

2.) Turn on the projector by using a remote that looks like this: 

3.) Quit ProPresenter if it is open. Go to the apple menu. Click “system preferences”. Then choose “Displays”. Click “Arrangement” and then click the checkbox next to “Mirror Displays”. Be sure to unchck this box when you are done.