If you need help setting up your external monitors, see How to use multiple monitors in Windows. If you’re having trouble setting up multiple monitors on Surface, see Troubleshoot connecting Surface to a second screen.
You can present with two monitors: Using Presenter View is a great way to view your presentation with speaker notes on one monitor (your laptop, for example), while your audience views the notes-free presentation on a different monitor (like a larger screen you're projecting to).
If you have followed the recommended steps at Connect Surface to an external display to connect to your external display, such as TV, monitor, or projector, and you're having trouble here are some things to try.
To connect your Surface to an external display such as a TV, monitor, or projector, you can use various video inputs such as USB-C, DisplayPort (DP), HDMI, DVI, or VGA.
You can adjust the brightness manually or let your PC handle it automatically based on lighting conditions or content. Important: You might not see the Brightness slider on devices that have an external monitor. To change the brightness on an external monitor, use the buttons on it.
Open task view: hover over the task view icon on the taskbar, or press the Windows key + Tab Right-click on the desktop that you want to customize and select Choose background Select a Picture: In the Personalize your background section, select Picture from the dropdown menu and choose the image you want to set as the background