How to switch screen display?

How do I change the output screen? right now the app is on my Audience Display Screen and the display is on my desk screen.

You can fix the screen swap by making sure your computer is set to "Extended Desktop" (press Windows + P and choose Extend), then opening "Presenter → Settings → Screens" to assign the correct monitor for your "Audience Display", "Stage Display", and "Control Screen". If the Audience Display is appearing on your desk monitor, simply switch the screen assignments so it outputs to the external display. You can also use "Window Display" mode under the same Screens settings, which opens the Audience Display in a movable window that you can drag to the correct monitor and maximize.