Change track distance for differential signals in Mentor ExpeditionPCB

[Pobyms]

I have many LVDS signals routed and I want to change the width of the tracks and the distance between the two tracks in a differential (LVDS) pair.

I have updated the restrictions for LVDS signals in CES and used the change width tool for the LVDS tracks. Now I need to change the distance between the tracks and I would like to do it somethow automatically instead of deleting all the tracks and re-routing again (all the signals are tunned, so that it means a lot of work).

Is there a tool in Expedition PCB to do this change automatically?

Thanks.