From the Ross tech website:
The [Transport Mode] function found in the Applications Screen is used in some vehicles using CAN for diagnostics, to Activate or De-activate a special Transport Mode that is used by the factory to put the cars into a "sleep" mode to conserve battery charge during long periods of inactivity.
[Activate Transport Mode]
Clicking this button will put applicable vehicles into Transport Mode, shutting down most systems.
[De-Activate Transport Mode]
Clicking this button will "wake up" applicable vehicles from Transport Mode, powering up most system.
These functions are only available when using professional-grade interfaces.
On some early CAN-based cars, Transport Mode cannot be re-enabled once the car has more than 150km on the odometer.