Hello,
While import the nets from schematic all the components are correctly imported and nets also imported properly. But ratsnest does not visible in pcb editor. I done all the changes like command widow >>view>>connections >> show all nets. Layer colours> show from and Tos enabled. But it does not show the ratsnest. If I route the track means I can able to route the traces . Means everything is ok execpt the visibility of ratsnest. I think may be due to some settings issue in the pcb editor in altium. please anyone can give me the solution for this.