To change your DAKboard display's orientation, first make sure your custom screen orientation is set correctly (if using a custom screen):
In the DAKboard settings, click on Screens, then choose your screen, and click the gear icon in the top right:
In the settings modal that opens, select Portrait or landscape and click save:
Next, click "Displays & Devices" and then click on the more actions button and select "Settings":
On the new screen that opens up, scroll down to the Screen section, and select the desired orientation.
Note: You'll need to be connected to the same wifi network in order to access the display settings.
Scroll down and click "Save Changes". Once complete, restart the device by unplugging the power and then plugging it back in. When it starts up, the orientation change will take effect. For DAKboard OS devices running v2.28 (find my release) and later, no restart is necessary and the changes will take effect immediately.
Note: If the orientation change did not take effect, repeat the process again, but wait 5-10 minutes after clicking "Save Changes", before unplugging your device.