Follow the below steps to change the Screen Orientation :
Connect Keyboard to raspberry PI device.
1. Use ctrl+m to minimize Pickcel player
2. Right-click and to select Screen Configuration menu.
3. Now you will see these screen configuration options.
4. Click Layout -> Screen -> HDMI-1 -> Orientation. You can select screen orientation according to your need.
5. After selecting the screen orientation option click the apply button.
6. After clicking on apply button the screen will restart and show confirm box, now you rotate your screen and click ok button otherwise after 10 seconds setting is reversed
7. After click "OK" the screen will reboot automatically, and the screen will change its orientation.