Ridiclous question here.
Humour it..
But say you are on a downwind heading (777 or 380) to a runway on a radar vectors,and you 'extend the centreline' to give you a decent situational awarness. In this case you will still get the 'Vnav path' indication or the VDI(Vertical displacement indicator)on the rhs of your ND. What distance finals is this VDI based upon and similarly what intercept to the final approach course is the progress page 'Distance to go' based upon.
Cheers ..
