Using the keyboard shortcut:
Hold down the Ctrl and Alt keys simultaneously.
While holding those two keys, press the Up arrow key.
This will flip your screen upside down. To flip it back to normal, simply repeat the process but press the Down arrow key instead of the Up key.
Using the Settings menu:
Click on the Start menu and select Settings.
Go to System and then Display.
Under the Orientation section, click on the dropdown menu and select Portrait.
This will also flip your screen upside down. To flip it back to normal, select Landscape from the dropdown menu.
It's important to note that these methods only work for Windows 10 and 11. The process for flipping the screen on other operating systems may vary.