Ideally, you're using 2 screens with OpenLP (ie. computer screen & a projector or large TV). One to control the output, and one to actually display the output. If you're using only 1 screen is when you run into the above issues.<br><br>Tips: Press . (period key) to turn Black Screen on and off. Press D to show/hide Desktop. Press T to toggle Theme Only. I haven't used PowerPoint with only 1 screen, but I think if you press ESC you can quit showing it. If that doesn't work, press the left or right arrow key to navigate back/forward one item in the service manager.<br>