How to rotate the screen on a Windows 10 computer to flip your PC monitor display

If you changed your screen orientation by accident or simply prefer it a different way, you can rotate or flip it in Windows ...
Ars Technica

Horizontally flip window or screen

I'm building a teleprompter, and I want to use a laptop or tablet pc as the main screen. There are several $50-$400 teleprompter software packages available to display the scrolling text, but none of ...

How to rotate the screen on a Samsung Galaxy S10 and troubleshoot your screen if it's not rotating

You can usually automatically rotate the screen on your Samsung Galaxy S10 when you turn the phone horizontally. Here's how ...
SlashGear

How To Rotate Your Screen On Android

If you've ever played a video on your Android device and turned it sideways, only for the video to remain stubbornly in vertical orientation, you may wonder why. But don't panic, as there's most ...