note about fahrenheit

docs/v3.md

@@ -54,6 +54,17 @@ If you have a kit without a metal case, you can use our free 3D printing case dr
     # systemctl enable --now kvmd-fan
     # ro
     ```
+    If you want the temperature to be displayed in Fahrenheit on the OLED, make following:
+    ```
+    # mkdir -p /etc/systemd/system/kvmd-oled.service.d
+    ```
+    Create file `/etc/systemd/system/kvmd-oled.service.d/override.conf`:
+    ```ini
+    [Service]
+    ExecStart=
+    ExecStart=/usr/bin/kvmd-oled --height=32 --clear-on-exit --fahrenheit
+    ```
+    And run `systemctl restart kvmd-oled`.
 
 6. !!! danger "Just reminding again: CHANGE THE PASSWORDS! :)"
     How to do this was written in [the "First steps" guide](first_steps.md){target=_blank}