Move screen rotation instructions to first-boot doc.

README.md

@@ -39,23 +39,6 @@ Make sure you have a [compatible 4+ GB SD card](http://elinux.org/RPi_SD_cards).
 
 The Pi needs a [2.5 Amp power source](https://www.raspberrypi.org/documentation/hardware/raspberrypi/power/README.md). Most modern USB chargers you'll have laying around will work, but an older/cheaper one may not.
 
-## Optional features
-
-### rotate screen: portrait and landscape mode
-
-- Hit CTRL-ALT-F1 then choose finish to go to console
-- sudo nano /boot/config.txt
-- move all the way down to the end of the file
-- to rotate 90° clockwise, add the line: display_rotate=1
-- Press ctrl + o to save and ctrl + x to exit the file
-
-Now do a reboot (sudo reboot) and you should have a screen tilted:
-
-- 0 = 0 degrees (the default value)
-- 1 = 90 degrees
-- 2 = 180 degrees
-- 3 = 270 degrees
-
 ## Common issues
 
 - **I get a kernel panic on boot, or the image keeps crashing.** The Raspberry Pi is somewhat picky about about its SD cards. It's also possible the SD card has a bad sector in a critical place, and `dd` wasn't be able to tell you. Double-check that you're using [a blessed SD card](http://elinux.org/RPi_SD_cards), and try flashing the image again.

docs/first-boot.md

@@ -58,6 +58,17 @@ If you need to login to a shell, the default username and password are `pi` and
 
 If the display auto-detection fails and chooses a funky default resolution for you, [there's a few things you can do](https://www.opentechguides.com/how-to/article/raspberry-pi/28/raspi-display-setting.html) to try and fix that.
 
+## Rotating your screen
+
+Press `Ctrl + Alt + F3` to get to a virtual terminal, and use your favorite editor to open `/boot/config.txt` (remember to use `sudo`). Add a line to the end of the file:
+
+- `display_rotate=0` to disable rotation
+- `display_rotate=1` to rotate 90° clockwise
+- `display_rotate=2` to rotate 180°
+- `display_rotate=3` to rotate 90° counter-clockwise
+
+Save the file, and `sudo reboot`.
+
 ## Replacing the boot graphics
 
 The image that's displayed while the kiosk is starting can be changed by just replacing `~/background.png`.