Click Start, Control Panel, Appearance and Personalization.
Choose ‘Connect an external display’ from the Display menu.
What’s shown on your main screen will be duplicated on the second display.
Select ‘Extend these displays’ from the ‘Multiple displays’ drop-down menu to expand your desktop across both monitors.
Can you connect 2 laptops screens together?
No, you can’t, laptops don’t have video inputs. Just get a monitor and connect to the laptop, you can use dual screens then.
Can I connect 2 laptops with HDMI?
To do this you need 2 HDMI ports (Output and Input) on the laptop to support this. You could use an HDMI splitter if you like to use second external laptop monitor is going to simply be a mirror of the first. Otherwise,If there is HD TV Tuner card/box it can accept HDMI input.
How do I connect two laptop screens using HDMI?
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How to setup dual monitor with Laptop using HDMI cable – YouTube
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How do I add a second screen to my laptop?
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CNET How to: Add a second monitor to your computer – YouTube
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