This method can only be used on Windows 7, right click on the desktop, and select “screen resolution”.
In the Options dialog box, select the "Directions" tab, select “ Landscape (Flip) & rdquo;, click “ Application & Rarr; OK & rdquo;, the desktop will return to normal display.
Tips
You can also adjust the screen orientation using shortcut keys:
Press Ctrl, Alt, and then use ↑↓←→ key. Finish! Want to rotate the effect? Just press CTRL, ALT and the up cursor key.
Ctrl+Alt+Left=90-degree counterclockwise rotation
Ctrl+Alt+Right=90-degree rotation clockwise
Ctrl+Alt+Up=Normal mode
Ctrl+Alt+down=Inverted mode
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