If you have a computer that is hooked up to a projector or a second monitor, you have a few options on how your computer will display each screen. It is important for you to understand the different settings, so you may choose the correct one to use based on your classroom technology (SMART Board, Document Camera, etc).
Here is a helpful video that briefly touches on these settings, and shows some more advanced configuration options:
Please contact your digital learning specialist if you need any more assistance with display options.