We need to modify the way the Raspberry Pi boots and we do this by typing the following command into a terminal window. (F4 will drop you out of emulation station and back to the terminal window)
sudo nano /boot/config.txt
Then we want to add the following line to the end of the file:
if this doesn’t rotate the display the right way (and this is going to depend on how you mounted the monitor) hen try the numbers 2 or 3 (0 should be normal mode so to speak).
You will need to reboot for this to take affect,
sudo reboot now.
After it reboots you should have the vertical screen!