You can keep the screen on when your MacBook or Windows laptop is closed by altering your laptop's power settings.
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How to connect a laptop to a monitor

Want to know how to connect a laptop to a monitor for your creative work? We're not surprised. After all, the best laptops ...
So my GF's new gig has issued her an Air and an external display. Apparently, the default configuration of macOS is to "ignore" when closing the lid if plugged in to power and an external display. Is ...