On the Connections screen you choose where the distance measured by the Roadbook Designer comes from. To open it, tap Connections in the Main Menu.
Select the option and tap Connect. The connection status appears below. For a RabbitBox v2, the Designer asks for your Rabbit Box number.
Which option should I choose?
The Designer keeps two calibrations: one R for the phone GPS and another R for all the other connections (Rabbit Box, Rabbit PRO, RabbitConnect and Steps). After changing the connection, always check the R on the calibration screen.