Next to the onboard icon, there should also be an onboard-settings icon. Simply open onboard-settings by clicking on the icon or by typing the name in the terminal and the configuration window will open, where you can change layout.
Next to the onboard icon, there should also be an onboard-settings icon. Simply open onboard-settings by clicking on the icon or by typing the name in the terminal and the configuration window will open, where you can change layout.