Resolution and rotation adjustment
________________________________________________________________________________
Raspberry Pi 3
Step 1. To open the command prompt, you can click CTRL + ALT + T
Step 2. Type the following command "sudo nano /boot/config.txt" and press the "Enter" key
Step 3. Locate the following information
Step 4. To leave the line as a comment, simply use # before the line.
Step 5. Change the values as follows and set the desired resolution (leaving the unused resolution commented out)
Step 6. The same applies to changing the screen rotation to Vertical/Horizontal
Step 7. Press Ctrl+X to exit and Y to save changes
Step 8. Press Enter key and type reboot to restart the player.
________________________________________________________________________________
Raspberry Pi 4
Step 1. To open the command prompt, you can click CTRL + ALT + T
Step 2. Type the command: sudo nano /boot/dispsetup.sh and press the "Enter" key:
Step 3. Edit the resolution, by default it is already in HD (1280x720):
Step 4. Click Ctrl+X to exit and Y to save changes.
Step 5. Press Enter key and type reboot to restart the player.
After rebooting the resolution will be correct.
To check procedures related to Raspberry Click Here.