Solution:

1. Keyboard Shortcut:

   • Hold down the "Ctrl" and "Shift" keys simultaneously.
   • While holding them, press the "Refresh" key (typically located in the top row with circular arrow icon).
   • The screen should rotate to the default landscape orientation.

2. Access Display Settings:

   • Click on the time in the bottom-right corner to open the system menu.
   • Select the gear-shaped "Settings" icon.
   • Scroll down and click on "Advanced" to reveal additional settings.
   • Click on "Display."
   • Locate the "Rotation" dropdown menu and select the desired orientation (usually "0 degrees" for landscape).
   • Confirm your choice.

3. Rotating with Touchscreen:

   • If you have a touchscreen Chromebook, you can rotate the screen by swiping down from the top right corner to open the quick settings menu.
   • Tap the "Screen rotation" icon to cycle through portrait and landscape modes.

4. Restart Chromebook:

   • Sometimes, a simple restart can resolve screen rotation issues.
   • Click on your profile picture in the bottom-right corner.
   • Select the power button and then "Restart."