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Click the start menu icon at the bottom left of the screen.
With the start menu open click on the gear icon above the start icon
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Once Windows settings page is open, click on system.
When you bring up the Systems page in setting you should see the following:
While on this page, scroll down until you see the title "Multiple displays". If you click on the arrow for multiple displays it should bring up the following options:
Make sure "Extend these displays" is correctly selected from the list.
Once correctly selected, you should have two screens that can individual individually be worked on.