There are two methods for editing the boot/config.txt file required to change screen rotation:
SD card method
Put your Pi's SD card in your computer and open the /boot/config.txt file in a plain-text editor such as Notepad or Sublime Text.
From your computer, open Terminal (Mac) or Command Prompt (Windows) and connect to your Raspberry Pi via SSH.
Then, run the following command to edit the file:
sudo nano /boot/config.txt
If you're using a touchscreen, skip this step.
If you have a value for
dtoverlay that contains the
rotate=90 command, change that value to your desired rotation:
dtoverlay value likely won't be the same as the
lcd_rotate value. For example, the default "normal" screen rotation would be
lcd_rotate=0. Therefore, you may need to test multiple configurations.
If you have no dtoverlay "rotate" value, insert one of the following values instead:
display_rotate=0 # Normal (landscape) display_rotate=1 # 90 degrees (portrait, upside down) display_rotate=2 # 180 degrees (landscape) display_rotate=3 # 270 degrees (portrait, upside down) display_rotate=0x10000 # horizontal flip display_rotate=0x20000 # vertical flip
If you're using a touchscreen, you'll also need to adjust touchscreen rotation. Otherwise, your taps will all be on the wrong part of the screen! This will adjust both display and touchscreen rotation.
Insert one of the following values at the end of the file:
lcd_rotate=0 # default (normal landscape) lcd_rotate=1 # 90 degrees (portrait, upside down) lcd_rotate=2 # 180 degrees (landscape) lcd_rotate=3 # 270 degrees (portrait, upside down)