Design Mode offers another time-saving feature, which is to move a controller to a different gateway (if the system utilizes multiple gateways of the same type). It can potentially save a lot of time in terms of configuring the controller settings.
You can move PXL controllers to another PXL gateway

You can move NXT controllers to other NXT Gateways

You can move NXT-MSC controllers to other MSC-SCP Gateways

Any controller which is moved to another gateway will retain all its configuration and settings:
Note: Ensure both gateways are online when you are moving controllers.