In order to prevent someone from making accidental changes to the setup of your Source Four LED or Selador Desire fixture it may be desirable to lock out the user interface. In order to do so press and hold the up and down arrows together for 3 seconds. A padlock icon will appear in the corner of the screen. The lock state persists through a reboot. To unlock the user interface, press and hold the up and down arrows together again for 3 seconds.
Locking the user interface does not prevent RDM commands from changing fixture settings.