Presentation settings - Monitors tab
This tab allows you to view the screens currently attached to your computer, so that you can see your screen resolutions (number of pixels). A screen could be a monitor, plasma screen, LCD monitor or projector. This screen is just for information.
The 'Open Windows display settings' opens the Windows display settings screen tab. You can use this screen to change the resolution (number of pixels) that are displayed on your screens. If you have multiple graphics cards installed (or have a notebook with an external monitor port) then you can use this to Extend your Windows desktop onto multiple monitors. See Windows display settings for more information.
If you extend your desktop on multiple monitors, you will be able to create presentations that span multiple screens, or play different presentations on each screen.